19NA037

Bulletin No.:
Service Bulletin
Date:
19-NA-037
February, 2021
TECHNICAL
Subject:
No Start, Hard Start with Belt Squeal, Belt Break, Loss of Power Steering and/or Power
Brake Assist
Brand:
Model:
Chevrolet
Chevrolet
Model Year:
from
to
Express
2018
2020
Express
2021
2021
GMC
Savana
2018
2020
GMC
Savana
2021
2021
VIN:
from
to
Engine:
Transmission:
4.3L - LV1
Plant Code N
6.6L- L8T
4.3L — LV1
Plant Code N
All
6.6L — L8T
Involved Region or Country
North America, Middle East and Israel.
Condition
Some customers may comment on one or more of the following:
• Vehicle will not start.
• Vehicle hard to start, with a squeal noise originating from the engine compartment.
• Vehicles fan belt broken.
• Loss of power steering
• Loss of vehicles power brake assist.
Cause
The cause of the condition may be water leaking from the cowl area into the generator
vents. Under certain weather conditions, this water can freeze inside and prevent the
generator from turning.
• Replace generator, belt, and any other pulleys that have been contaminated with
rubber build up from the belt heating up. Refer to the appropriate repair procedure
in SI.
Correction
5246048
Copyright 2021 General Motors LLC. All Rights Reserved.
Page 2
February, 2021
Bulletin No.: 19-NA-037
5246049
Note: The common location of the water leak path is shown in the graphics above.
• Seal water leak at cowl with Kent Automotive High-Tech™ Clear Seam Sealer,
following the steps in the Service Procedure below.
Service Procedure
5246055
5246053
1. Remove the air inlet grille panels and the
windshield wiper system module (1). Refer to
Windshield Wiper System Module Replacement,
in SI.
2. Note the location of the inner lower right side seam
circled in the graphic above.
Bulletin No.: 19-NA-037
February, 2021
Page 3
Parts Information
For replacement of generator, belt or pulleys, use the
vehicle identification number (VIN), and the GM
Electronic Parts Catalogue to determine the proper part
to order.
To obtain the High-Tech™ Clear Seam Sealer, contact
Kent Automotive at 1-888-YES-KENT
(1-888-937-5368).
Causal
Part
Description
Part
Number
Qty
N/A*
Kent Automotive
High-Tech™
Clear Seam
Sealer*
P10200
(5 oz)
As needed
* 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
5246057
Important: Be sure to apply the sealer to the entire
inner lower right side seam.
3. Apply Kent Automotive High-Tech™ Clear Seam
Sealer, # P10200, to the seam.
4. Reinstall the windshield wiper system module (1)
and the air inlet grille panels. Refer to Windshield
Wiper System Module Replacement, in SI.
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
1481178*
Wiper System Module R & R and Cowl Reseal
0.8 hr
* This is a unique Labor Operation for Bulletin use only. For consequential damage, use the labor operation associated with this
bulletin. All parts and labor associated should be claimed on the same transaction, using OLH as necessary to cover the labor for
repair/replacement of the subsequently damaged part(s). Refer to bulletin 18-NA-146 for additional information.
Version
3
Modified
Released February 26, 2019
Revised January 27, 2020 – Added 2020 Model Year.
Revised January 26, 2021 — Added 2021 Model Year and Plant 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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