NHTSA ID Number: 10205548
Manufacturer Communication Number: 21NA091
Summary
This service bulletin provides information for customers/dealers/technicians on Normal Rearview Camera Display Operation – Flashing Diamond – Spot – or UFO like image on Rear View Camera Display.
35 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
CADILLAC | CT4 | 2020 |
| CADILLAC | CT5 | 2020-2021 |
| CADILLAC | ESCALADE | 2020-2021 |
| CADILLAC | ESCALADE ESV | 2020-2021 |
| CADILLAC | XT4 | 2020-2021 |
| CHEVROLET | 3500 | 2020-2022 |
| CHEVROLET | BOLT EV | 2020 |
| CHEVROLET | CORVETTE | 2020-2021 |
| CHEVROLET | SILVERADO 1500 | 2020-2021 |
| CHEVROLET | SILVERADO 2500 | 2020-2022 |
| CHEVROLET | SUBURBAN | 2020-2021 |
| CHEVROLET | TAHOE | 2020-2021 |
| GMC | SIERRA 1500 | 2020-2021 |
| GMC | SIERRA 2500 | 2020-2022 |
| GMC | SIERRA 3500 | 2021-2022 |
| GMC | YUKON | 2020-2021 |
| GMC | YUKON XL | 2020-2021 |
Condition
Some customers may comment on a flashing light present on the radio display when in Reverse and with the rear view camera on, usually is corrected by an ignition cycle.
Correction
Please communicate to the customer that the rear view camera system and radio display are functioning as designed and this is a normal condition of their vehicle. Please share this information with the customer, including a copy of this bulletin.
Technicians should verify that no other conditions are present and return the vehicle to the customer.
SEOCONTENT-START
Copyright 2021 General Motors LLC. All Rights Reserved.
Service Bulletin Bulletin No.: 21-NA-091
Date: November, 2021
INFORMATION
Subject: Information on Normal Rear View Camera Display Operation – Flashing Diamond – Spot
– or UFO like Image on Rear View Camera Display
This bulletin replaces PIT5799A. Please discard PIT5799A.
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Cadillac
CT4
2020
2020
— — — —
CT5
2021
Escalade
Escalade
ESV
XT4
Chevrolet
Bolt EV
2020
2020
Corvette
Silverado 2021
1500
Silverado
2500HD/
3500HD
2022
Tahoe
2021
Suburban
GMC
Sierra 1500
2020
2021
Sierra
2500HD/
3500HD
2022
Yukon
2021
Yukon XL
Involved Region or Country
North America, Europe, Uzbekistan, Russia, Middle East, Israel, Palestine, Brazil, Chile,
Colombia, Ecuador, Paraguay, Peru, Japan, GM Korea Company, Cadillac Korea (South
Korea), Thailand, Australia/New Zealand
Additional Options (RPOs) Equipped with UVI, UVS or UV2
Condition Some customers may comment on a flashing light present on the radio display when in
Reverse and with the rear view camera on, usually is corrected by an ignition cycle.
Page 2 November, 2021 Bulletin No.: 21-NA-091
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Bulletin No.: 21-NA-091 November, 2021 Page 3
5787272
Page 4 November, 2021 Bulletin No.: 21-NA-091
5787273
Correction
Please communicate to the customer that the rear view camera system and radio display
are functioning as designed and this is a normal condition of their vehicle. Please share
this information with the customer, including a copy of this bulletin.
Technicians should verify that no other conditions are present and return the vehicle to
the customer.
Version 3
Modified Released April 13, 2021
May 03, 2021 – Added the Cadillac XT4 and updated the Involved Region or Country
section.
November 17, 2021 – Added the 2022 Model Year to the Silverado 2500HD/3500HD and
Sierra 2500HD/3500HD models.
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-091
Date: November, 2021
NHTSA ID Number: 10198874
Manufacturer Communication Number: 21NA091
Summary
This service bulletin provides information for customers/dealers/technicians on Normal Rearview Camera Display Operation – Flashing Diamond – Spot – or UFO like image on Rear View Camera Display.
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-091
Date: May, 2021
NHTSA ID Number: 10185745
Manufacturer Communication Number: PIT5799A
Summary
This Preliminary information communicates a concern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5799A
Published date: 12/18/2020
NHTSA ID Number: 10184127
Manufacturer Communication Number: PIT5799
Summary
This Preliminary information communicates a concern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5799
Published date: 11/19/2020
Reprogramming
GM Diagnostic/Programming (TIS2Web)
Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.
To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID’.
You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.
The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.
The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.
Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle. The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles.
The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.
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