N232397530

Service Update
N232397530 SBZA Modules Installed on Wrong Side of Rear
Bumper
Release Date:
Attention:
April 2023
Revision:
00
This service update involves vehicles in dealer inventory only and will expire April 30, 2024.
Make
Chevrolet
GMC
Model
Silverado 1500
Sierra 1500
Model Year
From
To
2023
2023
2023
2023
RPO
Description
This service update should be performed on vehicles in dealer inventory only. Involved vehicles are marked “Open” on
the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked
to confirm vehicle involvement prior to beginning any required inspections and/or repairs.
Condition
Correction
On certain 2023 model year Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles, the side blind
zone alert (SBZA) modules may have been installed on the wrong side of the rear bumper.
Dealers are to ensure the modules are in the correct location.
Parts
No parts are required.
Warranty Information
Labor
Operation
9106791
Description
Ensure modules are in the correct location
Labor
Time
0.4
Trans.
Type
ZFAT
Net
Item
N/A
Service Procedure
1.
Remove both the left and right-side Obstacle Detection Control Modules. Refer to Side Obstacle Detection Control
Module Replacement (ULV) in SI.
6328031
Note: The label on the module has “RH” listed after the part number to indicate it is the RH Side Obstacle Detection
Control Module. The bracket has an “R” molded into the part to indicate it is the R bracket.
2.
Verify the RH Side Obstacle Detection Control Module (1) is installed in the R bracket (2).
3.
Install the RH Side Obstacle Detection Control Module (1) and R bracket (2) onto the passenger’s side of the vehicle.
Refer to Side Obstacle Detection Control Module Replacement (ULV) in SI.
Copyright 2023 General Motors. All Rights Reserved.
Page 1 of 2
Service Update
N232397530 SBZA Modules Installed on Wrong Side of Rear
Bumper
6328036
Note: The label on the module has “LH” listed after the part number to indicate it is the LH Side Obstacle Detection Control
Module. The bracket has an “L” molded into the part to indicate it is the L bracket.
4.
Verify the LH Side Obstacle Detection Control Module (1) is installed in the L bracket (2).
5.
Install the LH Side Obstacle Detection Control Module (1) and L bracket (2) onto the driver’s side of the vehicle.
Refer to Side Obstacle Detection Control Module Replacement (ULV) in SI.
Dealer Responsibility
Dealers must take the steps necessary to ensure that the service update correction has been made to all involved vehicles
in dealer inventory before selling or dealer-trading the vehicle, but no later than April 30, 2024.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers
take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded,
released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.
Dealer Reports – For USA & Export
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.
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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.
We Support
Voluntary Technician
Certification
Page 2 of 2
GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6538
URGENT - DISTRIBUTE IMMEDIATELY
Date:
April 20, 2023
Subject: N232397530 - Service Update
SBZA Modules Installed on Wrong Side of Rear Bumper
Models: 2023 Chevrolet Silverado 1500
2023 GMC Sierra 1500
To:
Select General Motors Dealers
General Motors is releasing Service Update N232397530 today. The total
number of U.S. vehicles involved is 5. Please see the attached bulletin for
details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated April 20, 2023. A list of vehicles in dealer inventory is attached to this
message.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS