20NA033

Service Bulletin
Bulletin No.:
20-NA-033
Date:
April, 2020
TECHNICAL
Subject:
Squeak/Creak Noise from Rear Suspension
Model Year:
Brand:
Model:
Buick
Enclave
VIN:
from
to
from
2018
2020
Engine:
Additional
Options
(RPOs)
All
All
to
Cadillac
XT6
2020
2020
All
All
Chevrolet
Blazer
2019
2020
All
R0V
Chevrolet
Traverse
2018
2020
All
All
GMC
Acadia
2020
2020
All
FE5
Involved Region or Country
North America, Mexico, Russia, Middle East, Israel, Palestine, Chile, Columbia, Peru,
Japan, South Korea, Australia and New Zealand.
Condition
Some customers may comment on a squeak or creak noise originating from the rear
suspension of the vehicle.
Cause
The cause of the condition may be the pin in the rear spring aid (jounce).
Correction
If you encounter a vehicle with the condition above complete the following procedure to
remove, modify, and re-install the rear spring aid (jounce) pin.
Service Procedure
1. Raise and support the vehicle. Refer to Lifting and
Jacking the Vehicle in Si.
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Copyright 2020 General Motors LLC. All Rights Reserved.
2. Pry the rear spring aid pin upward and out by
inserting a trim tool or flat screwdriver in between
the gaps of the coils of the rear spring.
Page 2
April, 2020
Bulletin No.: 20-NA-033
4. File the burred edges and add a small taper to aid
in the insertion of the modified pin.
5. Apply a small amount of non-silicone lube to the
pin and within the foam cavity where the pin was
removed from.
Important: Only non-silicone lubricants should
be used.
6. Reinstall the pin. Use a flat screwdriver or trim tool
to push on the pin and ensure it is fully recessed
after reinstall.
Note: There should be an audible click noise once the
pin is fully re-installed.
7. Complete the same procedure on the
opposite side.
Parts Information
No parts are required for this repair.
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3. Once the pin is fully removed, trim 15 mm from the
pointed side of the pin using a small handsaw or
equivalent.
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.
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Labor Operation
Description
Labor Time
8080568*
Remove and Modify Rear Suspension Pin
0.5
*This is a unique Labor Operation for Bulletin use only.
Version
3
Modified
Released February 18, 2020
Revised February 26, 2020 — Removed the 2017-2019 GMC Acadia.
Revised March 26, 2020 — Added to apply lube to foam cavity within Step 5.
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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