Bulletin No.: 23-NA-209

Service Bulletin

Date: February, 2025

TECHNICAL
Subject:

Brand:

Oil Can and/or Pop Noise from Roof Area During Car Wash

Model:

Chevrolet

Colorado

GMC

Canyon

Model Year:

VIN:

from

to

from

to

2023

2025

-

-

Engine:

Transmission:

All

All

Involved Region or Country

North America

Additional Options (RPOs)

Excluding all vehicles equipped with Sunroof (RPO CAC)

Condition

Some customers may comment on an oil canning or popping noise originating from the
roof area during or after an automatic car wash.

Cause

The cause of the condition may be force from some air dryers at an automated car wash
can cause flex in the roof panel, causing a loud oil canning type sound.

Correction

Repair any damage done during the event and apply stiffening patches and install roof
panel longitudinal bow to the underside of the roof panel following the procedure listed
below.

Service Procedure
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.
If you encounter a vehicle with the above concern, repair any damage done to the roof by following the proper repair
procedures within SI.
Once the roof is repaired of all damage, complete the following procedure to install stiffening patches to the
underside of the roof panel.
1. Drop the headliner, but do not fully remove from the vehicle. Refer to Headlining Trim Panel Replacement in Si.

Copyright 2025 General Motors. All Rights Reserved.

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February, 2025

Bulletin No.: 23-NA-209

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2. If the vehicle has already had the 5 stiffening panels installed to the underside of the roof panel in
the RED locations in the illustration above, proceed to step 4. It is not necessary to remove any of the stiffening
panels that have been previously installed before installing the roof bow.

6832670

3. Once the headliner is dropped (but not removed) apply the 2 stiffening panels to the underside of the roof
panel in the RED locations in the illustration above.

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February, 2025

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4. Pre-Drill Roof Bow (6.7mm (17/64) for the rivet in the areas (x5) shown in the above graphics.

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Bulletin No.: 23-NA-209

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5. Using magnets to hold the roof bow in the proper position (Align the center line of the roof bow to the center line
of the triangles in roof bars as shown in the above image).
Drill holes in the underside roof structure using the pre-drilled roof bow as a template- and using depth control
device on bit.
6. Remove the roof bow.

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February, 2025

Bulletin No.: 23-NA-209

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7. Apply crash durable structural adhesive Fusor 2098 or equivalent as called out in the graphic with a 3mm width
of wet out along both ends.

6805509

8. Apply panel vibration control material - anti-flutter SEM #39977 or equivalent along the length of the bow as
called out in the above graphic.

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February, 2025

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Bulletin No.: 23-NA-209

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9. Install Roof Bow to the vehicle and Install Rivets (x5).
10. Once the panels and roof bow are installed, reinstall the headliner. Refer to Headlining Trim Panel
Replacement in Si.
11. Verify the condition is corrected

Parts Information
Causal
Part

N/A

Description

Part
Number

Qty

DEADENERF/FLR PNL FRT
SI

15828539

2

BOW-RF PNL
LGTDNL

85689511

1

Panel Vibration
Control Material
(Anti-flutter)*

SEM #39977

-

Crash Durable
Structural
Adhesive*

Fusor 2098

-

RIVET-DA PNL

19353808

5

* We believe this source and their products to be reliable.
There may be additional manufacturers of such products/
materials. General Motors does not endorse, indicate any
preference for, or assume any responsibility for the
products or material from this firm or for any such items
that may be available from other sources.

Bulletin No.: 23-NA-209

February, 2025

Page 9

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

6086158*

Install Roof Stiffening Patches and Roof Panel Longitudinal
Bow

2.0hr

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

Version

3

Modified

Released January 25, 2024
Revised March 18, 2024 – Added 2024 Model Year.
Revised February 07, 2025 – Updated service procedure to add steps to install Roof Bow
and supporting information.

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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