Service Bulletin

Bulletin No.:

17-NA-394

Date:

May, 2023

TECHNICAL
Subject:

Squeak, Clunking Type Noise Heard From Rear of Vehicle

Brand:

Model:

Chevrolet
GMC

Model Year:
from

to

Colorado

2015

2022

Canyon

2015

2022

Involved Region or Country

Condition 1

VIN:
from

to

Engine:

Transmission:

All

All

North America, Thailand, Korea, Peru, Guatemala, Argentina, Venezuela, and South
Africa
Some customers may comment on a squeak type noise heard from the rear of the
vehicle.
Upon further investigation, the technician may diagnose the noise is coming from the rear
suspension leaf spring area.
Note: The breakpoints below are relevant only to this Condition, and the cut off is in the
2019 model year.
Colorado SOP - Prior to 1GCGSCEN6K1241170
Canyon SOP - Prior to 1GTG5CEN8K1239279

Condition 2

Some customers may comment on a clunking type noise heard from the rear of the
vehicle.
Upon further investigation, the technician may diagnose the noise is coming from the rear
suspension leaf spring area.
Colorado SOP thru 2022
Canyon SOP thru 2022

Cause

These conditions may due to debris getting between the leaf springs.

Correction 1

Install new leaf spring inserts following the procedure below.

Correction 2

Re-torque the joints of the leaf spring assembly following the procedure below.

Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

May, 2023

Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.

Bulletin No.: 17-NA-394
following procedure:

Service Procedure (Condition 1)
Prior to performing this bulletin, follow the procedure for
Noise Diagnosis - Rear Suspension in SI to determine
the source of the noise. Jounce the rear of the vehicle
utilizing J 39570 Chassis Ear or equivalent, to aid in
locating the source of the noise.
If necessary, road test the vehicle.
1. Raise the vehicle on a frame lift-type hoist. Refer to
Lifting and Jacking the Vehicle, in SI.
2. Inspect the springs for damage.
• If damage has been found, refer to Rear Leaf
Spring Replacement, in SI.
• If damage has NOT been found, proceed to the
next step.

5341853

3. Install new Rear Leaf Spring Inserts using the

5358883

Caution: Do NOT damage the finish on Leaf Springs.
3.1. On the spring assembly, insert a plastic trim
tool or plastic wedge in between the #1 and
#2 leaf springs, to access the old insert.

Bulletin No.: 17-NA-394

May, 2023

Page 3

5341855

3.2. Push up on insert until it hits the bottom of the
spring above it. Then use a suitable cutting
tool to cut the stem off from the insert.

5341857

5341856

3.3. Remove the top portion of the insert, and then
remove the bottom portion of the
remaining stem.

3.4. Using a rag and degreaser, clean any dirt or
grease from between the leaf springs at the
insert location

Page 4

May, 2023

Bulletin No.: 17-NA-394

Important: After a new vehicle is delivered to a
customer, or new spring tip inserts are installed per
this bulletin, new inserts have a break-in period of
up to 1610 km (1000 miles), where some noise can
be expected. The gray spring inserts are designed
to work with absolutely no lubricant. Lubricants of
any kind must never be used on the gray spring tip
inserts and any remaining lubricant must be
completely removed when installing new tip
inserts.
Important: If the Service Procedure for Condition 1
fixes the squeak, DO NOT proceed to Service
Procedure (Condition 2).

Service Procedure (Condition 2)
1. Support the vehicle at curb height when re-torquing
the leaf spring U-bolt nuts.
Note: DO NOT remove the fuel tank.
5341859

Caution: Do NOT damage the surface of the new
insert when trimming.
3.5. Cut the stem of the new insert with a hacksaw
or suitable cutting tool. Make sure to leave 6
mm (0.240 in) of the stem.

4966874

5341861

3.6. Apply a small amount of RTV sealer around
the remaining portion of the stem.
3.7. Install the new insert into the leaf spring.
Make sure the stem portion lines up with the
slot in the spring. Remove the plastic trim tool
or plastic wedge to close the spring and seat
the new insert.
4. Repeat step #3 for the 7 remaining inserts.
5. Lower the vehicle to the ground and test drive to
verify the repair.

2. Loosen the left leaf spring anchor plate U-bolts (1).
3. Re-torque the anchor plate U-bolts (1). Refer to SI
for torque specifications.
4. Repeat steps 2 and 3 for the right side leaf spring.
5. Re-test the vehicle for the same clunking noise. If
the issue remains, follow the regular repair
procedure.

Parts Information
Causal
Part

N/A*

Description

Part
Number

Qty

Leaf Spring Insert

87828827

8

RTV Sealer

88864346
(In Canada,
88861418)

1

*For warranty transactions, DO NOT mark this/these
parts as the Causal Part. Enter the word “Bulletin” in the
Causal Part Description free-flow text field.

Bulletin No.: 17-NA-394

May, 2023

Page 5

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

8080508*

Rear Leaf Spring Insert Replacement (Condition 1)

0.5 hr.

8080398*

Retorque Bolts / Road Test (Condition 2)

0.6 hr.

*This is a unique Labor Operation for Bulletin use only.

Version

8

Modified

Released December 08, 2017
Revised February 09, 2018 – Updated steps for Service Procedure (Condition 2) and
Warranty Information (Condition 2).
Revised February 13, 2018 – Updated the Warranty Information (Condition 2).
Revised July 11, 2018 – Added 2018–2019 model years.
Revised August 06, 2019 – Updated Procedure, Parts and Warranty Information for
Spring Insert Replacement.
Revised March 04, 2021 – Added 2020–2021 Model Years, Removed Breakpoint from
Condition #2, Updated Export Countries
Revised November 15, 2021 – Added 2022 Model Year to Condition # 2, and an
Important after Step #5 in Service Procedure (Condition 1).
Revised May 01, 2023 – Revised Part Information with Updated Insert Part Number.

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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