13-05-22-001

File in Section:
Bulletin No.:
Service Bulletin
Date:
05 - Brakes
13-05-22-001
November, 2013
INFORMATION
Subject:
Pre-Formed and Pre-Flared Hydraulic Brake Pipe Kits Now Available for Service
Models:
2000-2006 Cadillac Escalade Models
2000-2006 Chevrolet Avalanche, Suburban, Tahoe
1999-2007 Chevrolet Silverado
2000-2006 GMC Yukon Models
1999-2007 GMC Sierra
The purpose of this bulletin is to inform dealers of an
improved service strategy to aid in the replacement of
hydraulic brake pipes for the above listed vehicles.
Customer Care and Aftersales (CCA) has released
pre-formed and pre-flared hydraulic brake pipe kits.
These kits can be used anytime replacement of the
entire brake pipe assemblies is required. These kits
include all the pre-formed and pre-flared brake pipes
needed when replacing the entire brake pipe assembly,
except the rear axle crossover pipe. If the rear axle
crossover pipe requires replacement, refer to the
appropriate parts catalog for ordering and the Brake
Pipe Replacement procedure in SI for installation
instructions. The following procedure describes how to
install these kits.
Replacement Procedure (Pickup and
Cab Chassis)
Removal
Warning: Brake fluid may irritate eyes and skin. In
case of contact, take the following actions:
• Eye contact—rinse thoroughly with water.
• Skin contact—wash with soap and water.
• If ingested—consult a physician immediately.
Caution: Avoid spilling brake fluid onto painted
surfaces, electrical connections, wiring, or cables.
Brake fluid will damage painted surfaces and cause
corrosion to electrical components. If any brake fluid
comes in contact with painted surfaces, immediately
flush the area with water. If any brake fluid comes in
contact with electrical connections, wiring, or cables,
use a clean shop cloth to wipe away the fluid.
Caution: Care should be taken to ensure that dirt,
water, grease, or other contaminants do not enter the
new brake pipes and threaded end fittings when the
pipes are being installed into the vehicle. Use tape or
other appropriate methods to cover the threaded end
fittings and the ends of the pipes to prevent dirt, water,
grease, or other contaminants from entering the pipes.
Remove all protective measures before connecting the
end fittings to the master cylinder, brake pressure
proportioning valve (where equipped), brake pressure
modulator valve (BPMV), or flexible brake hoses.
Copyright 2013 General Motors LLC. All Rights Reserved.
Caution: Cleanliness is important for the proper
function of the hydraulic brake system. Clean all dirt,
water, rust, etc from the areas adjacent to each brake
pipe tube nut before removing the brake pipe tube nuts.
Take care to ensure that no contaminants enter any
hydraulic fittings or openings during removal or
installation of the brake pipes.
Caution: Before removing any brake pipes from the
master cylinder, ABS module (BPMV), and the brake
pressure proportioning valve (where equipped) identify
the port locations. On the BPMV identify the port
location for each hydraulic component (e.g., Master
Cylinder Primary, Master Cylinder Secondary, LF
corner, RF corner, LR corner, RR corner, Rear Brake).
On the brake pressure proportioning valve identify the
port locations for each hydraulic component (e.g.
master cylinder primary inlet, master cylinder primary
outlet, master cylinder secondary inlet, master cylinder
secondary outlet, pre-charge pump). When installing
the replacement pipes, ensure that the replacement
pipes are installed in the correct port locations on the
master cylinder, BPMV, and brake pressure
proportioning valve, where equipped. If the pipes are
not installed in the correct port locations on all the
hydraulic components, the brake system including the
ABS system and/or TCS/VSES Stabiltrak system
(where equipped) will not operate correctly and may
result in damage to the hydraulic brake components.
Note: This procedure does not comprehend specific
vehicle models or brake system configurations. The
illustrations may not exactly reflect the vehicle being
repaired. Some LD pickups and LD SUVs may be
equipped with a brake pressure combination valve and
a brake pressure modulator valve pre-charge pump.
The brake pipes attached to these components should
be removed and replaced with the replacement pipes
provided in the service kit.
Note: This procedure is not intended for the repair or
replacement of a single damaged brake pipe. This
procedure is for the replacement of the entire brake
pipe assemblies with pre-formed and pre-flared
components.
Note: Remove the brake pipes from the existing
routing clips carefully to avoid damaging the clips as all
the clips will be re-used. The new brake pipes will be
Page 2
November, 2013
reinstalled into the existing clips. After installing the
new brake pipes, inspect the routing of the brake pipes
to ensure that the new brake pipes do not contact or
rub on any frame, body, or chassis components.
Carefully bend the pipes to increase clearance as
required.
Note: The brake pipes in these kits are not an exact
duplicate of the pipes currently installed on the vehicle.
These pipes have a nylon coating to provide better
corrosion protection and may have slightly different
shapes and bends and may not exactly match the
brake pipes being replaced. Some original equipment
pipes may use flexible hose sections near the master
cylinder or brake pressure proportioning valve that
attaches to the master cylinder to brake booster
mounting studs. The replacement pipes in this kit will
not use the flexible hose sections. The replacement
pipes have been designed to fit each vehicle
application. Because of the nylon coating on the
outside of the brake pipes, the outside diameter of the
pipe is slightly larger than the original pipes, Extra effort
may be required to insert the pipes into the existing
mounting clips. It is recommended to finger start all the
threaded end fittings into the master cylinder, brake
pressure proportioning valve, brake pressure
modulation valve, and flexible brake hoses before
performing the final tightening and torque of each
fitting.
Note: The brake pipes in these kits may have
additional large radius shipping bends to allow the
pipes to fit within the cardboard box. Those pipes with
additional shipping bends will have tags on either side
of each shipping bend. Carefully straighten the section
of pipe between the tags to remove the shipping bend.
Take care not to kink or damage the brake pipes. If a
brake pipe becomes kinked or damaged while
removing the shipping bends, it must be repaired or
replaced before installation into the vehicle. Take care
not to cut, nick, abrade or otherwise damage the nylon
coating on the brake pipes during installation.
Note: For Chassis Cab models, due to the installation
and mounting of the aftermarket equipment/body on the
rear of the chassis (i.e. flatbed, stake bed, box van,
dump body, etc) by the second stage manufacturer or
vehicle upfitter, it may be difficult or prohibitive to
remove the aftermarket body to enable replacement of
the OEM rear brake pipe. Each vehicle will need to be
assessed individually, however, it may be preferable to
hand bend a service replacement brake pipe using GM
P/N 88936298 PIPE, BRK (STEEL) (1/4" X 16 FT
ROLL) nylon coated bulk tubing available separately
from GM dealers, using GM P/N 15103241 Fitting, BRK
PIPE (1/2-20-2A THD) (1/4 TUBE STL) to attach to the
ABS module (BPMV) and GM P/N 11609443 Tube Nut
(7/16-24 UNS-2A THD) to attach to the rear axle jounce
hose. These tube nuts are designed to properly fit over
the nylon coated brake tubing. The tube nuts can also
be removed from the replacement rear pipe included in
the brake pipe service kit and installed on the hand
bent service replacement pipe. Route the hand bent
service replacement pipe from the ABS module
(BPMV) to the rear axle jounce hose ensuring adequate
clearance is maintained between the pipe and
surrounding components to ensure that the pipe is not
Bulletin No.: 13-05-22-001
damaged in service. Attach the hand bent service
replacement brake pipe securely to the chassis using
brake pipe clips, rubber coated P-clips, or other
suitable methods. The maximum distance between
attachment points or clips should not exceed 457 mm
(18"). If a brake pipe has a directional change (bend) of
30 degrees or more, a clip needs to be located as close
as possible to the bend.
3339728
1. Disconnect the master cylinder secondary (1) and
primary (2) brake pipe fittings from the master
cylinder.
2. Plug the master cylinder outlet ports to prevent
brake fluid loss and contamination.
3339729
3. For vehicles equipped with a combination valve,
disconnect the master cylinder secondary (1) and
primary (2) brake pipe fittings from the combination
valve.
Bulletin No.: 13-05-22-001
November, 2013
4. Plug the combination valve inlet ports to prevent
brake fluid loss and contamination.
Page 3
14. Remove the 3 left side body mount bolts and the
core support mount bolt. Refer to Drivetrain and
Front Suspension Frame Insulator Replacement
in SI.
Note: Only raise the body enough to gain hand
access to the brake pipe routing clips. Pay careful
attention to avoid stressing hoses and wiring
harnesses.
15. Carefully raise the left side of the body from
inboard of the frame rails
approximately 51 mm (2 in).
Note: Place the support blocks inboard of the frame
rails and as close to the body mounting points as
possible to evenly distribute the weight of the
vehicle body.
3339730
5. For vehicles equipped with a combination valve,
disconnect the secondary (1) and primary (2) brake
pipe fittings from the combination valve.
6. Raise and support the vehicle. Refer to Lifting and
Jacking the Vehicle in SI.
7. Remove the front and rear tire and wheel
assemblies. Refer to Tire and Wheel Removal and
Installation in SI.
8. Apply ACDelco Rust Penetrant and Inhibitor
10-4020 (GM P/N 88862628) or equivalent
penetrating lubricant to the bleeder screws of the
following components:
• Front brake calipers
• Rear brake calipers
9. Apply ACDelco Rust Penetrant and Inhibitor
10-4020 (GM P/N 88862628) or equivalent
penetrating lubricant to the brake pipe fitting tube
nuts at the following locations:
• Front brake hoses
• Brake pressure modulator valve (BPMV)
• Rear brake hose(s)
10. Remove the left and right front wheelhouse panels.
Refer to Wheelhouse Panel Replacement in SI.
11. Remove the engine protection shield, if equipped.
Refer to Engine Protection Shield Replacement
in SI.
12. Reference mark the parking brake front cable
adjuster nut at the equalizer and disconnect the
parking brake front cable. Refer to Parking Brake
Front Cable Replacement in SI.
13. Disconnect any wiring ground harnesses from the
body to the frame. Refer to Power and Grounding
Component Views in SI
16. Place blocks or supports inboard of the frame side
rails to support the body in at least 3 locations.
17. Remove the left side pickup box bolts and loosen,
but do not remove, the right side pickup box bolts.
Refer to Pickup Box Replacement in SI.
Note: Only raise the pickup box enough to gain hand
access to the brake pipe routing clips. Pay careful
attention to avoid stressing hoses and wiring
harnesses.
18. Carefully raise the left side of the pickup box
approximately 51 mm (2 in).
Note: Place the support blocks as close to the pickup
box mounting points as possible to evenly distribute the
weight of the vehicle body.
19. Place blocks or supports inboard of the frame side
rails to support the pickup box in at
least 3 locations.
20. Release the body wiring harness conduit from the
brake pipe retainers on the left side of the vehicle.
21. Position and secure the wiring harness aside.
2727389
Page 4
November, 2013
Bulletin No.: 13-05-22-001
22. Using side cutters, cut the right front brake pipe as
close as possible to the brake pipe fitting (1) at the
brake hose.
23. Using a 6 point socket, remove and discard the
right front brake pipe fitting tube nut.
24. Disconnect the left front wheel speed sensor
electrical connector and remove the sensor
harness retaining clips from the top of the left
frame rail.
2728205
27. Release the right front brake pipe from the left front
frame rail clips (1).
2728189
25. Release the right front brake pipe from the
clips (1) on the right frame rail.
2728215
28. Using side cutters, cut the left front brake pipe as
close as possible to the brake pipe fitting (1) at the
brake hose.
29. Using a 6 point socket, remove and discard the left
front brake pipe fitting tube nut.
30. Release the front brake pipes assembly from the
left frame rail clip (2).
2728198
26. Release the right front brake pipe from the front
frame crossmember clips (1).
Bulletin No.: 13-05-22-001
November, 2013
2728220
31. Release the front brake pipes assembly from the
left frame rail clips (1).
32. Clean the area surrounding the brake pipe fittings
on the BPMV thoroughly to remove all dirt and
debris.
3339723
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
33. Identify the brake pipe port locations at the BPMV
prior to disconnecting the brake pipe fittings.
Page 5
2728225
34. Using side cutters, cut the left front (1) and right
front (2) brake pipes as close as possible to the
brake pipe fittings at the BPMV.
35. Using a 6 point socket, remove and discard the
front brake pipe fitting tube nuts.
2728241
36. Using side cutters, cut the master cylinder
primary (1) and secondary (2) brake pipes as close
as possible to the brake pipe fitting at the BPMV.
37. Using a 6 point socket, remove and discard the
brake pipe fitting tube nuts.
38. Carefully remove the brake pipe routing clips from
the front brake pipe assembly.
39. Maneuver the front brake pipes one at a time and
remove the brake pipes from the vehicle.
Page 6
November, 2013
2728234
40. Using side cutters, cut the rear brake pipe (1) as
close as possible to the brake pipe fitting at
the BPMV.
41. Using a 6 point socket, remove and discard the
brake pipe fitting tube nut.
Bulletin No.: 13-05-22-001
2728259
43. Release the rear brake pipe from the left frame rail
clips (1).
2728497
2728250
42. Release the rear brake pipe from the left frame rail
clips (1).
44. Using side cutters, cut the rear brake pipe (1) as
close as possible to the brake pipe fitting at the
rear brake hose.
45. Using a 6 point socket, remove and discard the
rear brake pipe fitting tube nut.
46. Remove the rear brake pipe from the vehicle.
Installation
Caution: Use the correct fastener in the correct
location. Replacement fasteners must be the correct
part number for that application. Do not use paints,
lubricants, or corrosion inhibitors on fasteners, or
fastener joint surfaces, unless specified. These
coatings affect fastener torque and joint clamping force
and may damage the fastener. Use the correct
tightening sequence and specifications when installing
Bulletin No.: 13-05-22-001
November, 2013
Page 7
fasteners in order to avoid damage to parts and
systems. When using fasteners that are threaded
directly into plastic, use extreme care not to strip the
mating plastic part(s). Use hand tools only, and do not
use any kind of impact or power tools. Fastener should
be hand tightened, fully seated, and not stripped.
2728250
4. Install the rear brake pipe to the left frame rail
clips (1).
2728497
1. Install the rear brake pipe.
2. Install the rear brake pipe fitting tube nut (1).
Tighten
Tighten the nut to 25 Y (18 lb ft)
3339723
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
5. Connect the brake pipe fittings to the BPMV port
locations identified during removal.
2728259
3. Install the rear brake pipe to the left frame rail
clips (1).
Page 8
November, 2013
Bulletin No.: 13-05-22-001
2728225
6. Install the right front brake pipe fitting tube nut (2).
Tighten
Tighten the nut to 25 Y (18 lb ft)
7. Install the left front brake pipe fitting tube nut (1).
Tighten
Tighten the nut to 25 Y (18 lb ft)
2728241
10. Install the master cylinder primary brake pipe fitting
tube nut (1).
Tighten
Tighten the nut to 25 Y (18 lb ft)
11. Install the master cylinder secondary brake pipe
fitting tube nut (2).
Tighten
Tighten the nut to 25 Y (18 lb ft)
2728234
8. Install the rear brake pipe fitting tube nut (1).
Tighten
Tighten the nut to 25 Y (18 lb ft)
Note: Install the brake pipes to the routing clips and
retaining clips after all the brake pipes are fitted to the
vehicle.
9. Install the master cylinder primary and secondary
brake pipe assembly to the vehicle.
2728220
12. Install the front brake pipes assembly to the left
frame rail clips (1).
Bulletin No.: 13-05-22-001
November, 2013
2728215
13. Install the left front brake pipe fitting tube nut (1).
Tighten
Page 9
2728198
16. Install the right front brake pipe to the front frame
crossmember clips (1).
Tighten the nut to 25 Y (18 lb ft)
14. Install the front brake pipes assembly to the left
frame rail clip (2).
2728189
17. Install the right front brake pipe to the clips (1) on
the right frame rail.
2728205
15. Install the right front brake pipe to the left front
frame rail clips (1).
Page 10
November, 2013
2727389
18. Install the right front brake pipe fitting tube nut (1).
Tighten
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
Tighten the nut to 25 Y (18 lb ft)
Reposition the body wiring harness into the brake
pipe retaining clips.
Remove the blocks, lower the body and install
the 3 left side body mount bolts. Refer to Drivetrain
and Front Suspension Frame Insulator
Replacement in SI.
Remove the blocks, lower the pickup box and
install the pickup box bolts. Refer to Pickup Box
Replacement in SI.
Inspect the pickup box for correct alignment.
Connect any wiring ground harnesses from the
body to the frame. Refer to Power and Grounding
Component Views in SI.
Connect the parking brake front cable. Refer to
Parking Brake Front Cable Replacement in SI.
Connect the left front wheel speed sensor
electrical connector and install the sensor harness
retaining clips to the top of the left frame rail.
Install the engine protection shield, if equipped.
Refer to Engine Protection Shield Replacement
in SI.
Install the left and right front wheelhouse panels.
Refer to Wheelhouse Panel Replacement in SI.
Lower the vehicle enough to access the
combination valve and master cylinder brake pipe
fittings.
Bulletin No.: 13-05-22-001
3339730
29. For vehicles equipped with a combination valve,
connect the secondary (1) and primary (2) brake
pipe fittings to the combination valve.
Tighten
Tighten the brake pipe fittings to 25 Y (18 lb ft).
3339729
30. For vehicles equipped with a combination valve,
connect the master cylinder secondary (1) and
primary (2) brake pipe fittings to the combination
valve.
Tighten
Tighten the brake pipe fittings to 25 Y (18 lb ft).
Bulletin No.: 13-05-22-001
November, 2013
3339728
31. Connect the master cylinder secondary (1) and
primary (2) brake pipe fittings to the master
cylinder.
Tighten
Tighten the nut to 25 Y (18 lb ft)
32. Bleed the hydraulic brake system. Refer to
Hydraulic Brake System Bleeding in SI.
33. Install the front and rear tire and wheel assemblies.
Refer to Tire and Wheel Removal and Installation
in SI.
Replacement Procedure (Utilities)
Removal
Warning: Brake fluid may irritate eyes and skin. In
case of contact, take the following actions:
• Eye contact—rinse thoroughly with water.
• Skin contact—wash with soap and water.
• If ingested—consult a physician immediately.
Caution: Avoid spilling brake fluid onto painted
surfaces, electrical connections, wiring, or cables.
Brake fluid will damage painted surfaces and cause
corrosion to electrical components. If any brake fluid
comes in contact with painted surfaces, immediately
flush the area with water. If any brake fluid comes in
contact with electrical connections, wiring, or cables,
use a clean shop cloth to wipe away the fluid.
Caution: Care should be taken to ensure that dirt,
water, grease, or other contaminants do not enter the
new brake pipes and threaded end fittings when the
pipes are being installed into the vehicle. Use tape or
other appropriate methods to cover the threaded end
fittings and the ends of the pipes to prevent dirt, water,
grease, or other contaminants from entering the pipes.
Remove all protective measures before connecting the
end fittings to the master cylinder, brake pressure
proportioning valve (where equipped), brake pressure
modulator valve (BPMV), or flexible brake hoses.
Page 11
Caution: Cleanliness is important for the proper
function of the hydraulic brake system. Clean all dirt,
water, rust, etc from the areas adjacent to each brake
pipe tube nut before removing the brake pipe tube nuts.
Take care to ensure that no contaminants enter any
hydraulic fittings or openings during removal or
installation of the brake pipes.
Caution: Before removing any brake pipes from the
master cylinder, ABS module (BPMV), and the brake
pressure proportioning valve (where equipped) identify
the port locations. On the BPMV identify the port
location for each hydraulic component (e.g., Master
Cylinder Primary, Master Cylinder Secondary, LF
corner, RF corner, LR corner, RR corner, Rear Brake).
On the brake pressure proportioning valve identify the
port locations for each hydraulic component (e.g.
master cylinder primary inlet, master cylinder primary
outlet, master cylinder secondary inlet, master cylinder
secondary outlet, pre-charge pump). When installing
the replacement pipes, ensure that the replacement
pipes are installed in the correct port locations on the
master cylinder, BPMV, and brake pressure
proportioning valve, where equipped. If the pipes are
not installed in the correct port locations on all the
hydraulic components, the brake system including the
ABS system and/or TCS/VSES Stabiltrak system
(where equipped) will not operate correctly and may
result in damage to the hydraulic brake components.
Note: This procedure does not comprehend specific
vehicle models or brake system configurations. The
illustrations may not exactly reflect the vehicle being
repaired. Some LD pickups and LD SUVs may be
equipped with a brake pressure combination valve and
a brake pressure modulator valve pre-charge pump.
The brake pipes attached to these components should
be removed and replaced with the replacement pipes
provided in the service kit.
Note: This procedure is not intended for the repair or
replacement of a single damaged brake pipe. This
procedure is for the replacement of the entire brake
pipe assemblies with pre-formed and pre-flared
components.
Note: Remove the brake pipes from the existing
routing clips carefully to avoid damaging the clips as all
the clips will be re-used. The new brake pipes will be
reinstalled into the existing clips. After installing the
new brake pipes, inspect the routing of the brake pipes
to ensure that the new brake pipes do not contact or
rub on any frame, body, or chassis components.
Carefully bend the pipes to increase clearance as
required.
Note: The brake pipes in these kits are not an exact
duplicate of the pipes currently installed on the vehicle.
These pipes have a nylon coating to provide better
corrosion protection and may have slightly different
shapes and bends and may not exactly match the
brake pipes being replaced. Some original equipment
pipes may use flexible hose sections near the master
cylinder or brake pressure proportioning valve that
attaches to the master cylinder to brake booster
mounting studs. The replacement pipes in this kit will
not use the flexible hose sections. The replacement
pipes have been designed to fit each vehicle
application. Because of the nylon coating on the
Page 12
November, 2013
Bulletin No.: 13-05-22-001
outside of the brake pipes, the outside diameter of the
pipe is slightly larger than the original pipes, Extra effort
may be required to insert the pipes into the existing
mounting clips. It is recommended to finger start all the
threaded end fittings into the master cylinder, brake
pressure proportioning valve, brake pressure
modulation valve, and flexible brake hoses before
performing the final tightening and torque of each
fitting.
Note: The brake pipes in these kits may have
additional large radius shipping bends to allow the
pipes to fit within the cardboard box. Those pipes with
additional shipping bends will have tags on either side
of each shipping bend. Carefully straighten the section
of pipe between the tags to remove the shipping bend.
Take care not to kink or damage the brake pipes. If a
brake pipe becomes kinked or damaged while
removing the shipping bends, it must be repaired or
replaced before installation into the vehicle. Take care
not to cut, nick, abrade or otherwise damage the nylon
coating on the brake pipes during installation.
3339729
3. Disconnect the master cylinder secondary (1) and
primary (2) brake pipe fittings from the combination
valve.
4. Plug the combination valve inlet ports to prevent
brake fluid loss and contamination.
3339728
1. Disconnect the master cylinder secondary (1) and
primary (2) brake pipe fittings from the master
cylinder.
2. Plug the master cylinder outlet ports to prevent
brake fluid loss and contamination.
3339730
5. Disconnect the secondary (1) and primary (2) brake
pipe fittings from the combination valve.
6. Plug the combination valve outlet ports to prevent
brake fluid loss and contamination.
Bulletin No.: 13-05-22-001
November, 2013
3339731
7. If equipped, disconnect the BPMV front brake pipe
fitting (1) from the combination valve.
8. Plug the combination valve port to prevent brake
fluid loss and contamination.
Page 13
14. Apply ACDelco Rust Penetrant and Inhibitor
10-4020 (GM P/N 88862628 ) or equivalent
penetrating lubricant to the bleeder screws of the
following components:
• Front brake calipers
• Rear brake calipers
15. Apply ACDelco Rust Penetrant and Inhibitor
10-4020 (GM P/N 88862628 ) or equivalent
penetrating lubricant to the brake pipe fitting tube
nuts at the following locations:
• Front brake hoses
• Brake pressure modulator valve (BPMV)
• Rear brake hose(s)
16. Remove the left and right front wheelhouse panels.
Refer to Wheelhouse Panel Replacement in SI.
17. Remove the engine shield, if equipped. Refer to
Engine Shield Replacement in SI.
18. Reference mark the parking brake front cable
adjuster nut at the equalizer and disconnect the
parking brake front cable. Refer to Parking Brake
Front Cable Replacement in SI.
19. Disconnect any wiring ground harnesses from the
body to the frame. Refer to Power and Grounding
Component Views in SI.
20. Remove the 6 left side body mount bolts and the
core support mount bolt. Refer to Drivetrain and
Front Suspension Frame Insulator Replacement
in SI.
Note: Only raise the body enough to gain hand
access to the brake pipe routing clips. Pay careful
attention to avoid stressing hoses and wiring
harnesses.
21. Carefully raise the left side of the body from
inboard of the frame rails
approximately 51 mm (2 in).
Note: Place the support blocks inboard of the frame
rails and as close to the body mounting points as
possible to evenly distribute the weight of the
vehicle body.
22. Place blocks or supports inboard of the frame side
rails to support the body in at least 3 locations.
23. Release the body wiring harness conduit from the
brake pipe retainers on the left side of the vehicle.
24. Position and secure the wiring harness aside.
3339732
9. If equipped, disconnect the BPMV front brake pipe
fitting (1) from the brake pressure modulator valve
(BPMV) pre-charge pump.
10. Plug the BPMV pre-charge pump port to prevent
brake fluid loss and contamination.
11. Lower the spare tire and wheel assembly.
12. Raise and support the vehicle. Refer to Lifting and
Jacking the Vehicle in SI.
13. Remove the front and rear tire and wheel
assemblies. Refer to Tire and Wheel Removal and
Installation in SI.
Page 14
November, 2013
2727389
25. Using side cutters, cut the right front brake pipe as
close as possible to the brake pipe fitting (1) at the
brake hose.
26. Using a 6 point socket, remove and discard the
right front brake pipe fitting tube nut.
27. Disconnect the left front wheel speed sensor
electrical connector and remove the sensor
harness retaining clips from the top of the left
frame rail.
Bulletin No.: 13-05-22-001
2728198
29. Release the right front brake pipe from the front
frame crossmember clips (1).
2728205
30. Release the right front brake pipe from the left front
frame rail clips (1).
2728189
28. Release the right front brake pipe from the
clips (1) on the right frame rail.
Bulletin No.: 13-05-22-001
November, 2013
2728215
31. Using side cutters, cut the left front brake pipe as
close as possible to the brake pipe fitting (1) at the
brake hose.
32. Using a 6 point socket, remove and discard the left
front brake pipe fitting tube nut.
33. Release the front brake pipes assembly from the
left frame rail clip (2).
Page 15
3339723
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
36. For vehicles not equipped with RPO JL4, identify
the brake pipe port locations at the BPMV prior to
disconnecting the brake pipe fittings.
3339725
2973737
34. Release the front brake pipes assembly from the
left frame rail clips (1).
35. Clean the area surrounding the brake pipe fittings
on the BPMV thoroughly to remove all dirt and
debris.
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
37. For model year 2002 vehicles equipped with RPO
JL4, identify the brake pipe port locations at the
BPMV prior to disconnecting the brake pipe
fittings.
Page 16
November, 2013
3339724
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
38. For model year 2003-2008 vehicles equipped with
RPO JL4, identify the brake pipe port locations at
the BPMV prior to disconnecting the brake pipe
fittings.
Bulletin No.: 13-05-22-001
2973950
41. Using side cutters, cut the right front (1) and left
front (2) brake pipes as close as possible to the
brake pipe fittings at the BPMV.
42. Using a 6 point socket, remove and discard the
front brake pipe fitting tube nuts.
43. Carefully remove the brake pipe routing clips from
the front brake pipe assembly.
44. Maneuver the front brake pipes one at a time and
remove the brake pipes from the vehicle.
2973756
39. Using side cutters, cut the master cylinder
primary (1) and secondary (2) brake pipes as close
as possible to the brake pipe fitting at the BPMV.
40. Using a 6 point socket, remove and discard the
brake pipe fitting tube nuts.
2974926
45. Using side cutters, cut the left rear (1) and right
rear (2) brake front pipes as close as possible to
the brake pipe fittings at the BPMV.
46. Using a 6 point socket, remove and discard the
brake pipe fitting tube nuts.
Bulletin No.: 13-05-22-001
November, 2013
Page 17
Installation
Caution: Use the correct fastener in the correct
location. Replacement fasteners must be the correct
part number for that application. Do not use paints,
lubricants, or corrosion inhibitors on fasteners, or
fastener joint surfaces, unless specified. These
coatings affect fastener torque and joint clamping force
and may damage the fastener. Use the correct
tightening sequence and specifications when installing
fasteners in order to avoid damage to parts and
systems. When using fasteners that are threaded
directly into plastic, use extreme care not to strip the
mating plastic part(s). Use hand tools only, and do not
use any kind of impact or power tools. Fastener should
be hand tightened, fully seated, and not stripped.
2975122
47. Release the rear brake pipes from the left frame
rail clips (1).
2975213
1. Install the rear brake pipes to the vehicle.
2. Install the right rear brake pipe fitting tube nut (1) to
the rear brake frame to axle hose.
Tighten
Tighten the nut to 25 Y (18 lb ft)
3. Install the left rear brake pipe fitting tube nut (2) to
the rear brake frame to axle hose.
2975213
48. Using side cutters, cut the right rear (1) and left
rear (2) brake pipes as close as possible to the
brake pipe fittings at the rear brake frame to
axle hose.
49. Release the rear brake pipes from the frame
crossmember clip (3).
50. Using a 6 point socket, remove and discard the
brake pipe fitting tube nuts.
51. Remove the rear brake pipes from the vehicle.
Tighten
Tighten the nut to 25 Y (18 lb ft)
4. Install the rear brake pipes to the frame
crossmember clip (3).
Page 18
November, 2013
2975122
5. Install the rear brake pipes to the left frame rail
clips (1).
Bulletin No.: 13-05-22-001
3339725
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
7. For model year 2002 vehicles equipped with RPO
JL4, connect the brake pipe fittings to the BPMV
port locations identified during removal.
3339723
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
6. For vehicles not equipped with RPO JL4, connect
the brake pipe fittings to the BPMV port locations
identified during removal.
3339724
Note: Due to the similarity of the brake pipe fitting tube
nuts, it is imperative to identify the individual brake pipe
locations on the BPMV to ensure correct assembly.
8. For model year 2003-2006 vehicles equipped with
RPO JL4, connect the brake pipe fittings to the
BPMV port locations identified during removal.
Bulletin No.: 13-05-22-001
November, 2013
Page 19
13. Install the right front brake pipe fitting tube
nut (2) to the BPMV.
Tighten
Tighten the nut to 25 Y (18 lb ft)
2974926
9. Install the left rear brake pipe fitting tube nut (1) to
the BPMV.
Tighten
Tighten the nut to 25 Y (18 lb ft)
10. Install the right rear brake pipe fitting tube nut (2) to
the BPMV.
Tighten
Tighten the nut to 25 Y (18 lb ft)
2973756
14. Install the master cylinder primary and secondary
brake pipe assembly to the vehicle.
15. Install the master cylinder primary brake pipe fitting
tube nut (1) to the BPMV.
Tighten
Tighten the nut to 25 Y (18 lb ft)
16. Install the master cylinder secondary brake pipe
fitting tube nut (2) to the BPMV.
Tighten
Tighten the nut to 25 Y (18 lb ft)
2973950
Note: Install the brake pipes to the routing clips and
retaining clips after all the brake pipes are fitted to the
vehicle.
11. Install the front brake pipes to the vehicle.
12. Install the left front brake pipe fitting tube nut (1) to
the BPMV.
Tighten
Tighten the nut to 25 Y (18 lb ft)
2973737
Page 20
November, 2013
Bulletin No.: 13-05-22-001
17. Install the front brake pipes assembly to the left
frame rail clips (1).
2728198
2728215
21. Install the right front brake pipe to the front frame
crossmember clips (1).
18. Install the left front brake pipe fitting tube nut (1).
Tighten
Tighten the nut to 25 Y (18 lb ft)
19. Install the front brake pipes assembly to the left
frame rail clip (2).
2728189
22. Install the right front brake pipe to the clips (1) on
the right frame rail.
2728205
20. Install the right front brake pipe to the left front
frame rail clips (1).
Bulletin No.: 13-05-22-001
November, 2013
2727389
23. Install the right front brake pipe fitting tube nut (1).
Tighten
24.
25.
26.
27.
28.
29.
30.
31.
Tighten the nut to 25 Y (18 lb ft)
Reposition the body wiring harness into the brake
pipe retaining clips.
Remove the blocks, lower the body and install
the 6 left side body mount bolts. Refer to Drivetrain
and Front Suspension Frame Insulator
Replacement in SI.
Connect any wiring ground harnesses from the
body to the frame. Refer to Power and Grounding
Component Views in SI.
Connect the parking brake front cable. Refer to
Parking Brake Front Cable Replacement in SI.
Connect the left front wheel speed sensor
electrical connector and install the sensor harness
retaining clips to the top of the left frame rail.
Install the engine protection shield, if equipped.
Refer to Engine Protection Shield Replacement
in SI.
Install the left and right front wheelhouse panels.
Refer to Wheelhouse Panel Replacement in SI.
Lower the vehicle enough to access the
combination valve and master cylinder brake pipe
fittings.
Page 21
3339732
32. If equipped, connect the BPMV front brake pipe
fitting (1) to the BPMV pre-charge pump.
Tighten
Tighten the brake pipe fitting to 25 Y (18 lb ft).
3339731
33. If equipped, connect the BPMV front brake pipe
fitting (1) the combination valve.
Tighten
Tighten the brake pipe fitting to 25 Y (18 lb ft).
Page 22
November, 2013
3339730
34. Connect the secondary (1) and primary (2) brake
pipe fittings to the combination valve.
Tighten
Tighten the brake pipe fittings to 25 Y (18 lb ft).
Bulletin No.: 13-05-22-001
3339728
36. Connect the master cylinder secondary (1) and
primary (2) brake pipe fittings to the master
cylinder.
Tighten
Tighten the nut to 25 Y (18 lb ft)
37. Bleed the hydraulic brake system. Refer to
Hydraulic Brake System Bleeding in SI
38. Install the front and rear tire and wheel assemblies.
Refer to Tire and Wheel Removal and Installation
in SI.
39. Raise the spare tire and wheel assembly into the
stowed position.
3339729
35. Connect the master cylinder secondary (1) and
primary (2) brake pipe fittings to the combination
valve.
Tighten
Tighten the brake pipe fittings to 25 Y (18 lb ft).
Bulletin No.: 13-05-22-001
November, 2013
Page 23
Parts Information
Item
Model Years
C/K
Model
Option Usage
Front
Suspension
Part Number
1
1999-2002
C
15703
&JC5
Coil Spring
22933207
2
2003-2004
C
15703
&JC3-JVA
Coil Spring
22932583
3
2005-2007
C
15703
&JF7
Coil Spring
22932609
4
1999-2002
C
15753
&JC5
Coil Spring
22933210
5
2003-2007
C
15753
&JC3/JC4/JH1-B2E/B4V
Coil Spring
23158907
6
2004
C
15753
&JC4&B2E/B4V
Torsion Bar
22932587
7
2003-2007
K
15753
&JC3/JC4/JH1
Torsion Bar
22932587
8
2005-2007
C
15753
&JF3/JF7-B2E/B4V/NHT
Coil Spring
22932601
9
2005-2007
C
15753
&B2E/B4V/NHT
Torsion Bar
22932596
10
2005-2007
K
15753
&JF3/JF7
Torsion Bar
22932596
11
1999-2002
C
15903
&JC5
Coil Spring
22933212
12
2003-2004
C
15903
&JC3
Coil Spring
22932584
13
2005-2007
C
15903
&JF7
Coil Spring
22932603
14
1999-2002
C
15953
&JC5
Coil Spring
22933214
15
2003-2004
C
15953
&JC3
Coil Spring
22932585
16
2005-2007
C
15953
&JF3/JF7
Coil Spring
22932604
17
2005-2007
C
15543
&JF3&B2E/B4V/BTN/NHT
Torsion Bar
22932597
18
2005-2007
K
15543
&JF3
Torsion Bar
22932597
19
2005-2007
C
15543
&JF3-B2E/B4V/BTN/NHT
Coil Spring
22932602
20
2006-2007
C
15553
&JF7
Torsion Bar
22932600
21
2006-2007
K
15553
&JF7
Torsion Bar
22932600
22
2004
C
15543
&JC4
Coil Spring
22936596
23
1999-2002
K
15703
&JC5
Torsion Bar
22933208
24
2003-2004
K
15703
&JC3
Torsion Bar
22932586
25
2005-2007
K
15703
&JF7
Torsion Bar
22932595
26
1999-2002
K
15753
&JC5
Torsion Bar
22933211
27
1999-2002
K
15903
&JC5
Torsion Bar
22933213
28
2003-2004
K
15903
&JC3
Torsion Bar
22932588
29
2005-2007
K
15903
&JF7
Torsion Bar
22932598
30
1999-2002
K
15953
&JC5
Torsion Bar
22933215
31
2003-2004
K
15953
&JC3
Torsion Bar
22932589
32
2005-2007
K
15953
&JF3/JF7
Torsion Bar
22932599
33
2004-2007
K
15543
&JC4
Torsion Bar
22932590
34
2001-2002
C
15743
&JH6
Torsion Bar
22933209
35
2001-2002
K
15743
&JH6
Torsion Bar
22933209
36
2003, 2005-2007
C
15743
&JH6
Torsion Bar
22932605
37
2003, 2005-2007
K
15743
&JH6
Torsion Bar
22932605
38
2004
C
25743
&JH6-HVY
Torsion Bar
22932605
39
2004
K
25743
&JH6-HVY
Torsion Bar
22932605
40
1999-2000
C
25753
&JH6
Coil Spring
22933202
41
1999-2000
C
25903
&JH6
Coil Spring
22933203
42
2001-2002
C
25903
&JH6-HVY
Torsion Bar
22933194
43
2003-2004
C
25903
&JH6-HVY
Torsion Bar
22932579
44
1999-2000
C
25953
&JH6
Coil Spring
22933204
Page 24
November, 2013
Bulletin No.: 13-05-22-001
Item
Model Years
C/K
Model
Option Usage
Front
Suspension
Part Number
45
1999-2002
K
25753
&JH6-HVY
Torsion Bar
22933193
46
1999-2000
K
25903
&JH6
Torsion Bar
22933194
47
2003-2004
K
25753
&JH6-HVY
Torsion Bar
22932578
48
1999-2000
K
25953
&JH6
Torsion Bar
22933205
49
2001-2002
C
25753
&JH6&HVY
Torsion Bar
22933188
50
2001-2002
K
25753
&JH6&HVY
Torsion Bar
22933188
51
2003-2007
C
25753
&JH6&HVY
Torsion Bar
22932574
52
2003-2007
K
25753
&JH6&HVY
Torsion Bar
22932574
53
2001-2002
C
25743
&JH6&HVY
Torsion Bar
22933187
54
2001-2002
K
25743
&JH6&HVY
Torsion Bar
22933187
55
2003-2007
C
25743
&JH6&HVY
Torsion Bar
22932565
56
2003-2007
K
25743
&JH6&HVY
Torsion Bar
22932565
57
2001-2002
C
25903
&JH6&HVY
Torsion Bar
22933189
58
2001-2002
K
25903
&JH6&HVY
Torsion Bar
22933189
59
2001-2002
C
35903
&JH6/JH7&HVY
Torsion Bar
22933189
60
2001-2002
K
35903
&JH6/JH7&HVY
Torsion Bar
22933189
61
2003-2007
C
25903
&JH6&HVY
Torsion Bar
22932567
62
2003-2007
K
25903
&JH6&HVY
Torsion Bar
22932567
63
2003-2007
C
35903
&JH6/JH7&HVY
Torsion Bar
22932567
64
2003-2007
K
35903
&JH6/JH7&HVY
Torsion Bar
22932567
65
2001-2002
C
25953
&JH6&HVY
Torsion Bar
22933191
66
2001-2002
K
25953
&JH6&HVY
Torsion Bar
22933191
67
2001-2002
C
35953
&JH6/JH7&HVY
Torsion Bar
22933191
68
2001-2002
K
35953
&JH6/JH7&HVY
Torsion Bar
22933191
69
2003-2007
C
25953
&JH6&HVY
Torsion Bar
22932569
70
2003-2007
K
25953
&JH6&HVY
Torsion Bar
22932569
71
2003-2007
C
35953
&JH6/JH7&HVY
Torsion Bar
22932569
72
2003-2007
K
35953
&JH6/JH7&HVY
Torsion Bar
22932569
73
2001-2002
C
25943
&JH6&HVY
Torsion Bar
22933190
74
2001-2002
K
25943
&JH6&HVY
Torsion Bar
22933190
75
2001-2002
C
35943
&JH6/JH7&HVY
Torsion Bar
22933190
76
2001-2002
K
35943
&JH6/JH7&HVY
Torsion Bar
22933190
77
2003-2007
C
25943
&JH6&HVY
Torsion Bar
22932568
78
2003-2007
K
25943
&JH6&HVY
Torsion Bar
22932568
79
2003-2007
C
35943
&JH6/JH7&HVY
Torsion Bar
22932568
80
2003-2007
K
35943
&JH6/JH7&HVY
Torsion Bar
22932568
81
2001-2002
C
36003
&JH7&HVY-JVA
Torsion Bar
22933198
82
2001-2002
K
36003
&JH7&HVY
Torsion Bar
22933198
83
2003-2007
C
36003
&JH7&HVY
Torsion Bar
22932570
84
2003-2007
K
36003
&JH7&HVY
Torsion Bar
22932570
85
2001-2002
C
36053
&JH7&HVY
Torsion Bar
22933199
86
2001-2002
K
36053
&JH7&HVY
Torsion Bar
22933199
87
2001-2002
C
36453
&JH7&HVY
Torsion Bar
22933199
Note (1)
88
2001-2002
K
36453
&JH7&HVY
Torsion Bar
22933199
Bulletin No.: 13-05-22-001
Item
Model Years
November, 2013
C/K
Model
Option Usage
Page 25
Front
Suspension
Part Number
Note (1)
89
2003-2007
C
36053
&JH7&HVY
Torsion Bar
22932571
90
2005-2006
C
36403
&JH7&HVY&WBZ
Torsion Bar
22932571
Note (2)
91
2003-2007
K
36053
&JH7&HVY
Torsion Bar
22932571
92
2005-2006
K
36403
&JH7&HVY&WBZ
Torsion Bar
22932571
Note (2)
93
2001-2002
C
36403
&JH7&HVY
Torsion Bar
22933200
94
2001-2002
K
36403
&JH7&HVY
Torsion Bar
22933200
95
2003-2005
C
36403
&JH7&HVY-WBZ
Torsion Bar
22932576
96
2003-2005
K
36403
&JH7&HVY-WBZ
Torsion Bar
22932576
97
2006-2007
C
36403
&JH7&HVY-WBZ
Torsion Bar
22932576
98
2006-2007
K
36403
&JH7&HVY-WBZ
Torsion Bar
22932576
99
2000-2002
C
15706
&JC5-JL4
Torsion Bar
22933217
100
2000-2002
K
15706
&JC5-JL4
Torsion Bar
22933217
101
2003-2006
C
15706
&JC4/JH2-JL4
Torsion Bar
22932593
102
2003-2006
K
15706
&JC4/JH2-JL4
Torsion Bar
22932593
103
2003-2006
C
15706
&JC4/JH2&JL4
Torsion Bar
22932591
104
2002
K
15706
&JH5&JL4
Torsion Bar
22933216
105
2003-2006
K
15706
&JC4/JH2&JL4
Torsion Bar
22932591
106
2000-2002
C
15906
&JC5-JL4
Torsion Bar
22933219
107
2000-2002
C
15936
&JC5-JL4
Torsion Bar
22933219
108
2000-2002
K
15906
&JC5-JL4
Torsion Bar
22933219
109
2000-2002
K
15936
&JC5-JL4
Torsion Bar
22933219
110
2003-2006
C
15906
&JC4/JH2-JL4
Torsion Bar
22932594
111
2003-2006
C
15936
&JC4/JH2-JL4
Torsion Bar
22932594
112
2003-2006
K
15906
&JC4/JH2-JL4
Torsion Bar
22932594
113
2003-2006
K
15936
&JC4/JH2-JL4
Torsion Bar
22932594
114
2002
K
15936
&JH5&JL4
Torsion Bar
22933218
115
2003-2006
C
15906
&JC4/JH2&JL4
Torsion Bar
22932592
116
2003-2006
C
15936
&JC4/JH2&JL4
Torsion Bar
22932592
117
2003-2006
K
15906
&JC4/JH2&JL4
Torsion Bar
22932592
118
2003-2006
K
15936
&JC4/JH2&JL4
Torsion Bar
22932592
119
2000
C
25906
&JH6
Coil Spring
22933206
120
2001-2002
C
25906
&JH6
Torsion Bar
22933197
121
2002
C
25936
&JH6
Torsion Bar
22933197
122
2000-2002
K
25906
&JH6
Torsion Bar
22933197
123
2002
K
25936
&JH6
Torsion Bar
22933197
124
2003-2006
C
25906
&JH6
Torsion Bar
22932582
125
2003-2006
K
25906
&JH6
Torsion Bar
22932582
126
2003-2006
C
25936
&JH6
Torsion Bar
22932582
127
2003-2006
K
25936
&JH6
Torsion Bar
22932582
Note (1): 22933199 kit will service the master cylinder
to ABS module pipes, ABS to LF corner pipe, and ABS
to RF corner pipe. The brake pipe from the ABS module
to the rear axle jounce hose is designed for a 36053
model and will need to be cut in the straight section
forward of the rear axle jounce hose fitting, then install
P/N 11518522 tube nut and flare the end. Hand bend a
section of GM P/N 88936298 nylon coated bulk pipe to
Page 26
November, 2013
Bulletin No.: 13-05-22-001
match the original brake pipe rearward of the cut on the
replacement brake pipe. Use the tube nut from the end
of the replacement pipe for the attachment to the rear
axle jounce hose fitting and use P/N 11518522 tube nut
on the opposite (forward) end. Use P/N 11518687
Union to join the two brake pipe sections together.
Torque Tube Nut P/N 11518522 to 25 N-m (18 lb-ft).
The M12x1.0 Tube Nut (GM P/N 11518522, qty. 2),
M12x1.0 Union (GM P/N 11518687, qty. 1), and GM P/
N 88936298 PIPE, BRK (STEEL) (1/4" X 16 FT ROLL)
bulk tubing are available separately through GM
dealers.
Note (2): 22932571 kit will service the master cylinder
to ABS module pipes, ABS to LF corner pipe, and ABS
to RF corner pipe. The brake pipe from the ABS module
to the rear axle jounce hose is designed for a 36053
model and will need to be cut in the straight section
forward of the rear axle jounce hose fitting, then install
P/N 11518522 tube nut and flare the end. Hand bend a
section of GM P/N 88936298 nylon coated bulk pipe to
match the original brake pipe rearward of the cut on the
replacement brake pipe. Use the tube nut from the end
of the replacement pipe for the attachment to the rear
axle jounce hose fitting and use P/N 11518522 tube nut
on the opposite (forward) end. Use P/N 11518687
Union to join the two brake pipe sections together.
Torque Tube Nut P/N 11518522 to 25 N-m (18 lb-ft).
The M12x1.0 Tube Nut (GM P/N 11518522, qty. 2),
M12x1.0 Union (GM P/N 11518687, qty. 1), and GM P/
N 88936298 PIPE, BRK (STEEL) (1/4" X 16 FT ROLL)
bulk tubing are available separately through GM
dealers.
2001–2002 C/K 36453&JH7&HVY (Brake Pipe Kit P/N
22933199)
Rear pipe modifications using rear pipe from Brake
Pipe Kit, P/N 22933199:
3331010
1. Cut rear pipe in approximate location as shown by
red box
2. Install M12x1.0 tube nut 11518522 & flare end
(double inverted)
3. Install union 11518687 onto tube nut
4. Hand bend bulk pipe GM P/N 88936298 to
duplicate bends from the pipe removed from the
vehicle from the union back to the rear axle
jounce hose.
Bulletin No.: 13-05-22-001
November, 2013
Page 27
5. Install M12x1.0 tube nut 11518522 on end adjacent
to union.
6. Re-use tube nut from section of removed pipe on
end that attaches to rear axle jounce hose.
7. Torque tube nuts to 25 Y (18 lb ft).
2005–2006 C/K 36403&JH7&WBZ&HVY (Brake Pipe
Kit P/N 22932571)
Rear pipe modifications using rear pipe from Brake
Pipe Kit, P/N 22932571:
3331012
1. Cut rear pipe in approximate location as shown by
red box
2. Install M12x1.0 tube nut 11518522 & flare end
(double inverted)
3. Install union 11518687 onto tube nut
4. Hand bend bulk pipe GM P/N 88936298 to
duplicate bends from the pipe removed from the
vehicle from the union back to the rear axle
jounce hose.
5. Install M12x1.0 tube nut 11518522 on end adjacent
to union.
6. Re-use tube nut from section of removed pipe on
end that attaches to rear axle jounce hose.
7. Torque tube nuts to 25 Y (18 lb ft).
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION