# Service bulletin 21NA091

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10199265
- Published by NHTSA: 2021\-07\-19
- Manufacturer's number: 21NA091
- Manufacturer's date: 2021\-05\-03
- NHTSA component: BACK OVER PREVENTION

## NHTSA's 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10199265-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10199265-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance, Backup camera

## Vehicles listed

- 2020 CADILLAC CT4
- 2020 to 2021 CADILLAC CT5
- 2020 CADILLAC ESCALADE
- 2020 to 2021 CADILLAC ESCALADE ESV
- 2021 CADILLAC ESCALADE NA
- 2020 to 2021 CADILLAC XT4
- 2020 CHEVROLET BOLT EV
- 2020 to 2021 CHEVROLET CORVETTE
- 2020 to 2021 CHEVROLET SILVERADO 1500
- 2020 to 2021 CHEVROLET SILVERADO 2500
- 2020 to 2021 CHEVROLET SUBURBAN
- 2020 to 2021 CHEVROLET TAHOE
- 2020 to 2021 GMC SIERRA 1500
- 2020 to 2021 GMC SIERRA 2500
- 2020 to 2021 GMC YUKON
- 2020 to 2021 GMC YUKON XL

## Recalls for the same vehicles and component

- [22V868000](/recalls/nhtsa/22V868000.md), 2022-11-23: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

## Other bulletins for the same vehicles and component

- [22\-NA\-068](/bulletins/11014579.md), 2025-02-28, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY; BACK OVER PREVENTION: WARNINGS. This technical bulletin provides repair information to correct a customer concern of Diagnostic Tips For Park Assist Off Message / Unwanted Or False Park Assist Alerts / No DTCs.
- [PIT5697D](/bulletins/11011687.md), 2024-12-09, Service bulletin: UNKNOWN OR OTHER; BACK OVER PREVENTION: SENSING SYSTEM: CAMERA. This Preliminary information communication provides information to the technician on installing Regular Production Option Code UVC Rearview Camera. Technician will need to reference the latest version of General Motors Up\-fitter Integration Bulletin 152. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
- [23\-NA\-084](/bulletins/11006379.md), 2024-08-15, Service bulletin: BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING; VISIBILITY/WIPER; ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of a Blue Hourglass and No Gridlines on Radio Rear View Camera Display While in Reverse.
- [PIT5386J](/bulletins/10249298.md), 2024-01-29, Service bulletin: BACK OVER PREVENTION; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that are found to have a back\-up alarm inoperative during the Pre\-Delivery Inspection. On trucks equipped with the Back Up Alarm \(RPO 8S3\), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.
- [PIP5847B](/bulletins/10247363.md), 2023-12-18, Service bulletin: BACK OVER PREVENTION. This Preliminary information communicates the possibility of a misfire or rough running concern and abnormal engine noise due to excessive wear in exhaust roller follower axle pin.
- [PIT6087](/bulletins/10247357.md), 2023-12-18, Service bulletin: BACK OVER PREVENTION. This Preliminary information communicates the proper installation of the Left and Right Side Obstacle Detection Control Modules
- [N23\-241156](/bulletins/10243572.md), 2023-10-05, Service bulletin: BACK OVER PREVENTION:SOFTWARE. \(There may be future updates under this same release number.\) Your vehicle keeps getting better. This vehicle software update includes the following: Refinements: •Updates made to the overall vehicle software update process. Better Never Stops™
- [PIP5847A](/bulletins/10242281.md), 2023-09-18, Service bulletin: BACK OVER PREVENTION. This Preliminary information communicates the possibility of a misfire or rough running concern and abnormal engine noise due to excessive wear in exhaust roller follower axle pin.
- [PIT5990A](/bulletins/10240782.md), 2023-08-21, Service bulletin: BACK OVER PREVENTION; STRUCTURE. This Preliminary information communicates an issue with a wind noise while driving at highway speeds and dealers are to inspect the body harness pass through for being full seated into the cowl.
- [PIT5697C](/bulletins/10239171.md), 2023-07-17, Service bulletin: BACK OVER PREVENTION: CAMERA SYSTEM. This Preliminary information communication provides information to the technician on installing Regular Production Option Code UVC Rearview Camera. Technician will need to reference the latest version of General Motors Up\-fitter Integration Bulletin 152. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."

JSON: [/v1/bulletins/10199265](/v1/bulletins/10199265)

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