13082

BOSCH MASTER CYLINDER SAFETY RECALL
Bulletin No: 13082
Date: June 2013
SUBJECT:
Recall of Master Cylinders (used with Hydro-Max® Booster)
MODELS:
2003-2009 Chevrolet Kodiak and GMC TopKick C4/C5 Series
Serviced with a Suspect Master Cylinder
Robert Bosch LLC is conducting a safety recall. For the convenience of our customers,
General Motors has agreed to assist in administering this recall through its Chevrolet and
GMC dealers.
Parts involved in this recall were service parts only and were not installed in the vehicle when it
was built. Vehicles that were identified through a search of our part sales records have been
loaded into IVH. GM will contact those customers by letter.
Parts Managers are being provided a recall notification flyer and are being asked to post the
flyer in areas frequented by customers. If a GM customer believes they may have purchased
one of the suspect master cylinders, dealers are to perform the inspection and, repair if
necessary. The warranty transaction should be routed to your GM representative for approval
using the appropriate labor code contained in this bulletin.
DEFECT INVOLVED
Robert Bosch LLC has decided that a defect, which relates to motor vehicle safety, exists in
certain master cylinders (used with Hydro-Max® booster) manufactured between July 1,
2011, and April 12, 2012. These master cylinders incorporate a reservoir switch pocket with
additional clearance to more efficiently install and latch the fluid level indicator (FLI) switch.
The added clearance created a condition in which the FLI switch has the potential to move
outward, but remain within the reservoir switch pocket. If the FLI switch moves outward and
the float magnet is on the lower allowed level, the FLI may not be close enough to the float
magnet to activate in the event of low brake fluid. If the low brake fluid level is caused by an
external leak, resulting in the escape of fluid from the brake system, it can result in increased
pedal travel. If this condition goes unheeded, it can result in a reduction of hydraulic pressure
to the disc brake calipers or wheel cylinders and lessen the braking force available. A
reduction in braking force can cause an increase in stopping distance and a vehicle crash may
occur.
SERVICE ACTION REQUIRED
GM customers may bring their vehicle to a Chevrolet or GMC dealer for an inspection of the
manufacturing date of the master cylinder. If the manufacturing date is between July 1, 2011,
and April 12, 2012, the FLI switch will be replaced.
Copyright 2013 General Motors. All Rights Reserved.
Page 2
June 2013
Bulletin No.: 13082
VEHICLES INVOLVED
Known involved vehicles are identified by Vehicle Identification Number on the Investigate
Vehicle History screen in GM Global Warranty Management system.
For dealers with known involved vehicles, a listing with involved vehicles containing the
complete vehicle identification number, customer name, and address information has been
prepared and will be provided to dealers through the GM GlobalConnect Recall Reports.
Dealers will not have a report available if they have no known involved vehicles currently
assigned.
The listing may contain customer names and addresses obtained from Motor Vehicle
Registration Records. The use of such motor vehicle registration data for any purpose other
than follow-up necessary to complete this recall is a violation of law in several
states/provinces/countries. Accordingly, you are urged to limit the use of this report to the
follow-up necessary to complete this recall.
PART INFORMATION
Parts required to complete this recall are to be obtained from General Motors Customer Care
and Aftersales (GMCC&A). Please refer to your “involved vehicles listing” before ordering
parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an
emergency situation, parts should be ordered on a CSO = Customer Special Order.
Part Number
Description
19301984
SWITCH, BRK M/CYL (brake fluid level switch)
Quantity/Vehicle
1
(If Req'd)
SERVICE PROCEDURE
3405417
1. Locate the master cylinder manufacturing date code (1). The manufacturing date code (1)
is marked on the upper left side of the master cylinder mounting flange. Refer to the
photograph.
Page 3
June 2013
Bulletin No.: 13082
Note: For purposes of identification, the letter that follows the four numbers is ignored.

If the manufacturing date code (1) is 1182 through 2103, replace the brake fluid level
switch. Proceed to the next step.

If the manufacturing date code (1) is less than 1182 or greater than 2103, no further
action is required.
3415395
Sectioned view of reservoir. (1) Fluid Level Indicator Switch (2) Flat Blade Screwdriver
2. Remove the brake fluid level switch from the master cylinder reservoir. Using a flat #2
screwdriver, position the screwdriver tip between the switch face and the reservoir body as
shown. Rotate the screwdriver blade tip until the switch breaks free; remove the switch.
3. Install the new brown color brake fluid level switch into the master cylinder reservoir until
the tabs click.
4. Install the connector onto the new brake fluid level switch.
WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Note: If an inspection and/or repair is performed on a GM vehicle that is not in IVH, submit
the warranty transaction to your GM representative for approval using the appropriate labor
code below.
Labor
Code
V2818
V2819
Description
Inspect Master Cylinder Date Code – No Further Action Req'd
Brake Fluid Level Switch Replacement (inc inspection)
Labor
Time
0.2
0.4
CUSTOMER NOTIFICATION
General Motors will notify customers of this recall on their vehicle (see copy of customer letter
included with this bulletin).
Page 4
June 2013
Bulletin No.: 13082
DEALER RECALL RESPONSIBILITY
(For US States, Territories, and Possessions)
It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used
item of motor vehicle equipment (including a tire) covered by this notification under a sale or
lease until the defect or noncompliance is remedied.
The US National Traffic and Motor Vehicle Safety Act provides that each vehicle that is subject
to a recall of this type must be adequately repaired within a reasonable time after the customer
has tendered it for repair. A failure to repair within sixty days after tender of a vehicle is prima
facie evidence of failure to repair within a reasonable time. If the condition is not adequately
repaired within a reasonable time, the customer may be entitled to an identical or reasonably
equivalent vehicle at no charge or to a refund of the purchase price less a reasonable
allowance for depreciation. To avoid having to provide these burdensome remedies, every
effort must be made to promptly schedule an appointment with each customer and to repair
their vehicle as soon as possible. In the recall notification letters, customers are told how to
contact the US National Highway Traffic Safety Administration if the recall is not completed
within a reasonable time.
DEALER RECALL RESPONSIBILITY
(All)
Dealers are to service all vehicles subject to this recall at no charge to customers, regardless
of mileage, age of vehicle, or ownership, from this time forward.
In summary, whenever a vehicle subject to this recall enters your vehicle inventory, or is in
your dealership for service in the future, you must take the steps necessary to be sure the
recall correction has been made before selling or releasing the vehicle.
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 tools,
equipment, 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 dealer for information on whether your vehicle may benefit from the information.
We Support
Voluntary Technician
Certification
Page 5
June 2013
Bulletin No.: 13082
June 2013
Dear General Motors Customer:
This notice is sent to you in accordance with the requirements of the National Traffic and
Motor Vehicle Safety Act.
Robert Bosch LLC is conducting a safety recall. For your convenience, General Motors has
agreed to assist in administering the recall through our Chevrolet and GMC dealers.
IMPORTANT



Why is your
vehicle being
recalled?
Your vehicle is involved in safety recall 13082.
Schedule an appointment with your GM dealer.
This service will be performed for you at no charge.
Robert Bosch LLC has decided that a defect, which relates to motor
vehicle safety, exists in certain master cylinders (used with HydroMax® booster) manufactured between July 1, 2011, and April 12,
2012. Your 2003-2009 model year Chevrolet Kodiak or GMC
TopKick vehicle may have been serviced with one of these master
cylinders.
These master cylinders incorporate a reservoir switch pocket with
additional clearance to more efficiently install and latch the fluid
level indicator (FLI) switch. The added clearance created a
condition in which the FLI switch has the potential to move outward,
but remain within the reservoir switch pocket. If the FLI switch
moves outward and the float magnet is on the lower allowed level,
the FLI may not be close enough to the float magnet to activate in
the event of low brake fluid. If the low brake fluid level is caused by
an external leak, resulting in the escape of fluid from the brake
system, it can result in increased pedal travel. If this condition goes
unheeded, it can result in a reduction of hydraulic pressure to the
disc brake calipers or wheel cylinders and lessen the braking force
available. A reduction in braking force can cause an increase in
stopping distance and a vehicle crash may occur.
What will we
do?
Your GM dealer will inspect the manufacturing date of the master
cylinder and, if the date is between July 1, 2011, and April 12, 2012,
will replace the FLI switch. This service will be performed for you at
no charge.
Because of service scheduling requirements, it is likely that your
dealer will need your vehicle longer than the actual inspection time
of approximately 15 minutes. If the master cylinder requires
replacement, an additional 10 minutes will be required.
What should
you do?
You should contact your GM dealer to arrange a service
appointment as soon as possible.
Page 6
Do you have
questions?
June 2013
Bulletin No.: 13082
If you have questions or concerns that your dealer is unable to
resolve, please contact the Chevrolet and GMC Medium Duty
Customer Assistance Center at 1-800-862-4389.
If after contacting your dealer and the Customer Assistance Center, you are still not satisfied
we have done our best to remedy this condition without charge and within a reasonable time,
you may wish to write the Administrator, National Highway Traffic Safety Administration, 1200
New Jersey Avenue, SE, Washington, DC 20590, or call the toll-free Vehicle Safety Hotline at
1.888.327.4236 (TTY 1.800.424.9153), or go to http://www.safercar.gov. The National
Highway Traffic Safety Administration Campaign ID Number for this recall is 13E011000.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a
copy of this notice to the lessee within ten days.
Jim Moloney
General Director,
Customer and Relationship Services
GM Recall #13082