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Service bulletin 20NA237

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10186102
Published by NHTSA2021-02-01
Manufacturer's number20NA237
Manufacturer's date2020-12-23
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT

NHTSA's summary

This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Equipment and accessories, Software

Vehicles listed
BUICK ENCORE GX2021
BUICK ENVISION2021
CADILLAC CT42021
CADILLAC CT52021
CADILLAC XT42021
CADILLAC XT52021
CADILLAC XT62021
CHEVROLET BLAZER2021
CHEVROLET CAMARO2021
CHEVROLET CORVETTE2021
CHEVROLET MALIBU2021
CHEVROLET SILVERADO 15002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2021
CHEVROLET TAHOE2021
GMC ACADIA2021
GMC SIERRA 15002021 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2021
GMC YUKON XL2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V4210002021-06-10. AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
24-NA-0662024-04-10. Service bulletin. This service bulletin provides repair information for technicians that may be Unable to Complete Serial Data Authentication on the vehicle.
20-NA-1322024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
N23-2410272023-08-25. Service bulletin. '(There may be future updates under this same release number.) Your Buick Envision keeps getting better. This software update includes the following, if your vehicle is equipped: Refinements: •Updates made to improve the Automated Heated Seat functionality. •Updates made to the overall vehicle software update process. •Updates made to improve connectivity within Apple CarPlay. •A variety of other minor software updates to make your driving and in-vehicle experience better. Better Never Stops™
N23-2411562023-08-04. Service bulletin. '(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™
N23-2410102023-06-24. Service bulletin. (There may be future updates under this same release number.) Your Chevrolet Corvette keeps getting better. This vehicle software update includes the following: Refinements: Updates made to the overall vehicle software update process. Better Never Stops™
N23-2410102023-06-24. Service bulletin. (There may be future updates under this same release number.) Your Chevrolet Corvette keeps getting better. This vehicle software update includes the following: Refinements: Updates made to the overall vehicle software update process. Updates made to the air conditioning system to maintain consistent cooling performance. Updates made to the radio display graphics and audio connectivity while using OnStar & SiriusXM. Updates made to the headlamp functionality to improve the ease of use. A variety of other minor software updates to make your driving and in-vehicle experience better. Better Never Stops™
PIT5762F2023-02-13. Service bulletin. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues between the modules.
PIP5632G2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP4902Q2023-01-30. Service bulletin. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP58142023-01-30. Service bulletin. This Preliminary information communicates that there some service parts released to dealers missing software.