17NA152

Bulletin No.:
Service Bulletin
Date:
17-NA-152
March, 2020
TECHNICAL
Subject:
Brand:
Buick
Cadillac
Chevrolet
GMC
Holden
Front Power Seat Slight Rocking Movement While Shifting Weight from Seat, During
Hard Stops, and/or When Driving Over Rough Road Surface
Model:
Model Year:
Date Breakpoint:
from
to
LaCrosse
2017
2018
Enclave
2018
2018
Envision
2015
2019
XT4
2019
2019
XT5
2018
2018
Cruze
(VIN B)
2016
2019
Malibu
(VIN Z)
2016
2016
Malibu
2017
2018
Equinox
(VIN X)
2018
2018
Traverse
2018
2018
Acadia
2018
2018
Terrain
2018
2018
Equinox
2018
2019
from
to
Engine:
Transmission:
All
All
Involved Region or Country
North America, Europe, Russia, Middle East, Israel, Argentina, Brazil, Chile, Colombia,
Ecuador, Paraguay, Peru, Uruguay, Japan, South Korea, China, Thailand, Australia, New
Zealand, Egypt, Africa
Additional Options (RPOs)
Equinox (VIN X) or Terrain equipped with driver/passenger power seats (AG1) or (AG2)
Cruze (VIN B) equipped with driver power seat (AH5)
Condition
Some customers may comment on feeling slight rocking movement of a front power seat
while shifting weight from seat, during hard stops, and/or when driving over rough road
surfaces.
Cause
The cause of the condition may be unintended movement of the driver or passenger seat
vertical adjuster actuator.
Correction
Apply load, then re-torque the three fasteners retaining the seat vertical adjuster actuator
following the Service Procedure below.
Copyright 2020 General Motors LLC. All Rights Reserved.
Page 2
March, 2020
Bulletin No.: 17-NA-152
Service Procedure
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4784161
1. Prepare the affected seat for removal by powering
the seat cushion to it’s fully upward position, then
lower it approximately 5.0–10 mm (0.20–
0.40 in).
4784167
2. Remove the seat. Refer to Driver or Passenger
Seat Removal and Installation in SI.
3. Position seat on a clean, protected surface with the
seatback angled down and the underside
accessible.
Bulletin No.: 17-NA-152
March, 2020
Page 3
4975754
Note: Removal of the seat cushion outer finish cover is
necessary to access the seat motor and also achieve
torque wrench access to all three fastener positions.
Examples of an Equinox seat (1) and a Malibu seat (2)
are shown in the graphic above.
4. Remove the seat cushion outer finish cover. Refer
to Front Seat Cushion Outer Finish Cover
Replacement in SI.
4975757
Note: The intent on applying a load to the height
adjuster motor is to force full gear mesh, and lessen
any teeth clearance between the gear on the actuator
and the sprocket on the seat track, reducing seat
movement.
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5. Loosen the three vertical adjuster actuator nuts (1).
Page 4
March, 2020
Bulletin No.: 17-NA-152
4975758
Important: Only tighten the clamp until it comes to a
comfortable stop position. DO NOT apply additional
load to try and force the gear interface any further.
6. Using an adjustable, or similar type clamp (1),
position one jaw at the end of the seat frame (2)
and the other jaw flush against the seat motor (3),
and cinch the clamp tight. This will apply a load
which will allow the actuator gear to be FIRMLY
pressed into the sprocket.
4975765
7. Keeping the clamp in position, use a torque wrench
to tighten the top-most fastener first.
Tighten
Tighten the nut to 27 Y (20 lb ft).
4991103
4975762
Important: The three nuts should be tightened in
sequence of top-most nut first (1), middle second
(2), and lower last (3).
8. With the top fastener holding the load, tighten the
middle then the lower nuts to the same torque
specification.
9. Remove the clamp.
Bulletin No.: 17-NA-152
March, 2020
Page 5
Parts Information
No parts are required for this repair.
Warranty Information
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor
Operation
Description
Labor Time
7080438*
Apply Load, Re-torque Seat
Vertical Adjuster Actuator
Fasteners
0.5 hr
*This is a unique Labor Operation for bulletin use only.
4784192
10. Reinstall the seat cushion outer finish cover (1).
Refer to Front Seat Cushion Outer Finish Cover
Replacement in SI.
11. Reinstall the seat to the vehicle. Refer to Driver or
Passenger Seat Removal and Installation in SI.
12. Verify seat movement condition has been
improved/minimized.
Version
9
Modified
June 1, 2017 – Updated text and graphic for step 6.
June 14, 2017 – Added GMC Terrain model.
December 21, 2017 – Added Cruze (VIN B) model.
February 27, 2018 – Added Models and revised the Service Procedure using clamp to
provide gear load.
March 12, 2018 – Added Holden Equinox model.
April 16, 2018 – Added Buick Envision model and updated breakpoint dates.
October 2, 2018 – Added Cadillac XT4 model, added 2019 Cruze and Holden Equinox
models, and updated the torque specification in the Service Procedure.
February 28, 2020 – Removed previously listed Date breakpoints and updated the
Involved Region or Country section.
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.
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