23-NA-128

Bulletin No.:
Service Bulletin
Date:
23-NA-128
November, 2023
TECHNICAL
Subject:
Noise from Roof Area at Speeds 35 MPH (56 km/h) and Above
Brand:
Model:
GMC
Acadia
Model Year:
VIN:
from
to
from
to
2017
2023
-
-
Engine:
Transmission:
All
All
Involved Region or Country
North America and Middle East
Condition
Some customers may comment on a wind noise originating from the roof area during
speeds of 35 mph (56 km/h) and greater.
Cause
The cause of the condition may be the roof rack cross bar rub strip may be above the bar
allowing the wind to get under it causing noise.
Correction
Install the new rub strip which has a different profile from the current one, by following the
procedure 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.
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•
•
•
Copyright 2023 General Motors LLC. All Rights Reserved.
AB = Above Bar and Below Bar
A = Above Bar
B = Below Bar
Page 2
November, 2023
Bulletin No.: 23-NA-128
If you encounter a vehicle with the rub strip above,
above and below, or appears to be sitting on top of the
cross bar as seen here, follow the rub strip replacement
procedure below:
1. Remove affected Cross Bar from vehicle.
2. Place Cross Bar assembly on work bench.
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4. Using a Plastic Trim Stick, lift the rub strip at the
center of the bar and pull it out of the track from the
center outward to one end, then do the same in the
other direction and remove it from the bar.
5. Wipe the bar down with a clean cloth
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3. Locate the center of the top of the bar where there
is a rectangular opening under the rub strip.
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Bulletin No.: 23-NA-128
November, 2023
Page 3
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6. Insert the new rub strip into the channel of the bar
beginning at the center and work your way to one
end, either left or right, by pushing on the strip until
it goes under the outer leg of the bar. Then do the
same for the other half of the bar.
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7. Ensure that the new rub strip is flush to, or below
the surface of the bar.
8. Reinstall cross bar on vehicle.
9. Road test to ensure there is no noise from the
cross bar at speeds of 35 MPH (56 km/h) and
above.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
Luggage Strip
86578722
1
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
1086728*
Roof Rack Cross Bar Rub Strip Replacement
Use Published Labor
Operation Time
*This is a unique Labor Operation for Bulletin use only.
Version
1
Modified
Released November 17, 2023
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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