19NA236

Bulletin No.:
Service Bulletin
Date:
19-NA-236
October, 2019
TECHNICAL
Subject:
Binding and/or Clunking Noise Heard While Operating the Front Door Windows
Brand:
Model:
Chevrolet
Express
GMC
Savana
Model Year:
Breakpoint:
from
to
from
to
2018
2020
-
-
Engine:
Transmission:
-
-
Involved Region or Country
North America, Middle East and Israel
Condition
Some customers may comment on a binding and/or clunking noise heard when operation
the front door windows.
Cause
This condition may be caused by insufficient grease in the window regulator clock spring.
Correction
Apply M-77 Paste to the clock spring windings following the procedure below.
Service Procedure
1. Remove the front side door trim panel. Refer to
Front Side Door Trim Panel Replacement in SI.
5422043
5422036
2. Using an acid brush, apply M-77 Paste to the clock
spring windings, as shown in the pictures above.
Note: It may be necessary to apply pressure to one
side of the spring to open a gap for paste.
3. Test the window to ensure that the noise is gone.
4. Reinstall the front side door trim panel. Refer to
Front Side Door Trim Panel Replacement in SI.
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
October, 2019
Bulletin No.: 19-NA-236
Parts Information
Causal
Part
Description
Part
Number
Qty
N/A*
LUBRICANT,
ACDELCO M-77
PASTE (2.0 OZ/
57g TUBE)
19356408
(U.S.)
1
19356409
(Canada)
*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
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
1086118*
Applying M-77 Paste to the Clock Spring Windings
0.5 hrs.
*This is a unique Labor Operation for Bulletin use only.
Version
1
Modified
Released October 22, 2019
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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