Bulletin No.:

Service Bulletin

Date:

22-NA-133
October, 2023

TECHNICAL
Subject:

Convertible Wind Noise at Rear Quarter Glass
This bulletin replaces PIC6318D. Please discard PIC6318D.

Brand:

Model:

Chevrolet

Camaro Convertible

Model Year:

VIN:

from

to

from

to

2016

2024

—

—

Engine:

Transmission:

—

—

Involved Region or Country

North America, Argentina, Brazil, Bolivia, Chile, Colombia, Ecuador, Paraguay, Peru,
Uruguay, Europe, Russia, Middle East, Israel, Japan, China, Taiwan, Philippines

Condition

Some customers may comment on a wind noise from the rear quarter window area of the
vehicle while driving.

Cause

This noise may be caused by the misalignment between the front side window and the
rear quarter window of the vehicle. This concern may occur on either / both side(s) of the
vehicle.

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.

4805542

The first step in diagnosing a wind noise is to confirm
the noise is actually coming from the side window area.
Dealership technicians are to tape off this gap between
the front side window and the rear quarter window. Test
drive the car to verify the noise has been eliminated. If
so, the quarter glass to front side window gap may be
mis-adjusted. To correctly set the gap / location
between the rear quarter window and the front side
window, there are three measurements that must be
checked / adjusted. The first two measurements are
Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

October, 2023

actually both related to the vertical gap between the
front side window and the rear side window. The
vertical gap between these two windows is not parallel.
It is actually "V-shaped" by design. When in the relaxed
position, (folding top is stowed or in the lowered
position) the gap at the top between the 2 windows is
12 mm wide, and the gap at the bottom of the glass
between these two is actually 10 mm. This adjustment
MUST be made with the folding top in the stowed or
lowered position. The reason for this is when the top is
closed and latched, it pinches the windows together
and pushes the top of the quarter glass forward slightly.
The result is an even, 10 mm gap between the two
windows from top to bottom. This even gap can be
seen in the photo above as the folding top is in the
raised, or closed position.
The third measurement / adjustment that must be made
is the height of the rear quarter glass. It should be
located so that it sits 4 mm higher than the front side
window glass. This can also be seen in the photo
above.
1. Rear Quarter Glass
2. Front Side Glass
3. 4 mm difference in height

Bulletin No.: 22-NA-133

4784707

If the adjustments listed above have been made and
the wind noise is still present, inspect for the presence
of a foam piece in the rear of the window channel as
seen in the photo below. If no foam is found, obtain
some and insert it into the window channel. If a foam
piece is already located in the window channel, it may
be beneficial to remove it and install a slightly larger
foam piece in its place. This larger piece of foam will
put more outward tension on the window seal and
reduce any lingering wind noise.

4784706

Once the quarter window is adjusted into position,
compare the 2 panes of glass at the base to make sure
they are flush with each other (inboard vs outboard). If
the difference between the front and rear windows is
more than 1.5 mm, or if there is a visible gap / daylight
can be seen between the seals, the rear quarter glass
needs to be adjusted further.
First, loosen the nut circled in the photo below. Then,
gently push out on the base of the quarter glass to
decrease this noticeable gap. Once the gap is within
1.5 mm of the front side glass, tighten this fastener
down to 80 inch pounds (9 Nm) of torque. Do not push
the glass out too far as this will result in additional glass
alignment issues. Test drive the vehicle and determine
if the noise has been eliminated or if more adjustment is
needed.

4847044

Bulletin No.: 22-NA-133

October, 2023

Page 3

Warranty Information
Because the repair may be one of several listed,
dealerships are to use the labor operation that most
closely relates to the repair performed.
Version

2

Modified

Released June 24, 2022
Revised October 10, 2023 – Added the 2024 Model Year and removed Korea from the
Involved Region or Country section.

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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