Bulletin No.:

Service Bulletin

Date:

17-NA-097
December, 2021

TECHNICAL
Subject:

Side Blind Zone is Not Working Correctly and/or Incorrect Side Mirror Notification

Brand:

Model:

Chevrolet

Bolt EV

Opel/
Vauxhall

Ampera-e

Model Year:
from

VIN:
to

from

to

—

—

Engine:

Transmission:

—

—

2021
2017

2019

Involved Region or Country

North America, Europe, GM Korea Company, Middle East

Additional Options (RPOs)

Equipped with Side Active Safety Obstacle Detection Enhanced (RPO UKC)

Condition

Some customers may comment when driving, the side mirror indicates there is a vehicle
present when there actually is not.
Technicians may find one or more of the following conditions:
• Wiring harness to the sensors may not be properly connected or routed.
• Butyl tape not covering the sensor bracket completely.
• Butyl tape missing completely.

Cause

If the side blind zone has been found not working properly, inspect one or more of the
following areas:
• Butyl tape application at the sensor brackets.
• Sensor harness electrical connection and routing.
• Poor grounding at the G401 and/or G404 body ground.

Correction 1

4749843

Inspect the wiring harness electrical connectors for proper connections and routing.

Copyright 2021 General Motors LLC. All Rights Reserved.

Page 2

December, 2021

Bulletin No.: 17-NA-097

Correction 2

4749759

Important: The opening must be completely covered with the butyl tape to avoid
allowing unwanted radar reflection to be detected and triggering the false alerts.
Install a new single piece of aluminum butyl tape on the bottom of the object sensing alert
module brackets so the opening is completely covered by the tape.

Correction 3

4847139

Remove the G401 (2) and G404 (1) grounds. Clean and remove paint from contact
points.

Bulletin No.: 17-NA-097

December, 2021

Service Procedure

Page 3

6. Remove the quarter lower rear trim panel. Refer to
Quarter Lower Rear Trim Panel Replacement in SI.
7. Remove the G401 and G404 electrical connector.
8. Inspect and remove any paint from the ground
contact points.
9. Torque the bolts to specifications. Refer to
Fastener Specifications in SI.
10. Install the quarter lower rear trim panel.
11. Update the side object sensor module using the
Service Programming System (SPS) with the latest
calibrations available on TIS2WEB. Refer to Side
Object Sensor Programming and Setup in SI.
If the side blind zone and/or side mirror indicators are
not performing properly, refer to SI for further
diagnostics.

Parts Information
Description

Part
Number
42563361
(LH)

TAPE-RR BPR
FASCIA EXTN

42563362
(RH)

Qty

1

Warranty Information

4847179

1. Raise the vehicle to its full height. Refer to Lifting
and Jacking the Vehicle in SI.
2. Inspect the side blind zone sensors (2) electrical
connector (1) for proper connection and routing of
the wiring harness (4).
3. Using Acrysol or equivalent, clean the bottom of
the module and allow to dry.
4. Peel the backing off of the aluminum butyl tape (3)
and apply to the bottom of the module.
5. Lower the vehicle.
• If the side blind zone and/or side mirror
indicators are performing properly, no further
work is required.
• If the side blind zone and/or side mirror
indicators are not performing properly, continue
with procedure.

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

6480398*

Inspect Sensor Electrical
Connections and Apply
Butyl Tape to Both Object
Sensing Modules

0.4 hr

Add

Inspection and Cleaning of
G401 and G404 Ground
Contact Points

0.8 hr

Add

Side Object Sensor
Reprogramming with SPS

0.3 hr

*This is a unique Labor Operation for bulletin use only.

Page 4

December, 2021

Bulletin No.: 17-NA-097

Version

6

Modified

August 16, 2017 – Added Vauxhall to models and wiring electrical connectors and ground
information.
November 14, 2017 – Added Side Object Sensor Module Programming and Setup
information.
August 10, 2018 – Added the 2018 and 2019 Model Years.
October 16, 2020 – Added 2020 Model Year to Bolt EV.
December 17, 2021 – Added 2021 Model Year to Bolt EV.

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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