Squeak/Creak Noise from Rear Suspension – 2018-2021 Buick Cadillac Chevrolet GMC

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Copyright 2021 General Motors LLC. All Rights Reserved.
Service Bulletin Bulletin No.: 20-NA-033
Date: January, 2021
TECHNICAL
Subject: Squeak/Creak Noise from Rear Suspension
Brand: Model:
Model Year: VIN: Engine: Additional
Options (RPOs)
from to from to
Buick Enclave 2018 2021 All All
Cadillac XT6 2020 2021 All All
Chevrolet Blazer 2019 2021 All R0V
Chevrolet Traverse 2018 2021 All All
GMC Acadia 2020 2021 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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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 January, 2021 Bulletin No.: 20-NA-033
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3. Once the pin is fully removed, trim from the pointed
side of the pin using a small handsaw or
equivalent.
Important: Cut Pin to a Height of 72mm.
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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.
Bulletin No.: 20-NA-033 January, 2021 Page 3
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
8080568* Remove and Modify Rear Suspension Pin 0.5
*This is a unique Labor Operation for Bulletin use only.
Version 4
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.
Revised January 25, 2021 — Added 2021 Model Year and Modified Length in Step 3.
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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