# Service bulletin 21\-NA\-188

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: 10215627
- Published by NHTSA: 2022\-07\-12
- Manufacturer's number: 21\-NA\-188
- Manufacturer's date: 2022\-06\-24
- NHTSA component: EQUIPMENT

## NHTSA's summary

This service bulletin provides service information/procedures on continuous improvement Radio Software Version V158 Update to address customer comments on software related issues.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10215627-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10215627-9999.pdf)

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

## Components

Equipment and accessories

## Vehicles listed

- 2021 to 2022 BUICK ENCORE GX
- 2021 to 2022 BUICK ENVISION
- 2021 to 2022 CADILLAC CT4
- 2021 to 2022 CADILLAC CT5
- 2021 to 2022 CADILLAC XT4
- 2021 to 2022 CADILLAC XT5
- 2021 to 2022 CADILLAC XT6
- 2021 to 2022 CHEVROLET BLAZER
- 2022 CHEVROLET BOLT EV
- 2022 CHEVROLET CAMARO
- 2022 CHEVROLET CORVETTE
- 2022 CHEVROLET EQUINOX
- 2021 to 2022 CHEVROLET MALIBU
- 2021 CHEVROLET SILVERADO 1500
- 2021 CHEVROLET SILVERADO 2500
- 2021 CHEVROLET SILVERADO 3500
- 2021 CHEVROLET SUBURBAN
- 2021 CHEVROLET SUBURBAN 1500
- 2021 CHEVROLET TAHOE
- 2021 to 2022 CHEVROLET TRAILBLAZER
- 2021 to 2022 GMC ACADIA
- 2021 GMC SIERRA 1500
- 2021 GMC SIERRA 2500
- 2021 GMC SIERRA 3500
- 2022 GMC TERRAIN
- 2022 GMC TERRAIN NA
- 2021 GMC YUKON
- 2021 GMC YUKON XL

## Recalls for the same vehicles and component

- [2022160](/recalls/tc/2022160.md), 2022-03-31: Accessories
- [2021365](/recalls/tc/2021365.md), 2021-06-10: Accessories
- [21V440000](/recalls/nhtsa/21V440000.md), 2021-06-10: EQUIPMENT:MECHANICAL:ACCESSORY SCISSOR/SCREW/BOTTLE JACK/LIFT:STAND
- [20V295000](/recalls/nhtsa/20V295000.md), 2020-05-21: EQUIPMENT:OTHER:LABELS; TIRES

## Other bulletins for the same vehicles and component

- [22\-NA\-237](/bulletins/10254392.md), 2024-05-08, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Service Cluster Message and DTC U3000 Set.
- [23\-NA\-064](/bulletins/10254014.md), 2024-05-02, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.
- [21\-NA\-249](/bulletins/10253789.md), 2024-05-01, Service bulletin: EQUIPMENT. This service bulletin provides repair information to correct a customer concern of the carpet appearance near the center console area.
- [21\-NA\-155](/bulletins/10253528.md), 2024-04-23, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; EQUIPMENT. This informational bulletin advises the technician to check for faults that may be caused by the trailer otherwise found by a possible faulty trailer connector.
- [20\-NA\-132](/bulletins/10253527.md), 2024-04-23, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- [17\-NA\-052](/bulletins/10253526.md), 2024-04-23, Service bulletin: WHEELS; EQUIPMENT. This bulletin updates the position of General Motors on refinishing aluminum wheels. GM has determined that wheel refinishing under warranty will no longer be performed.
- [PIP5972](/bulletins/10253110.md), 2024-04-15, Service bulletin: EQUIPMENT. This Preliminary information communicates the possibility of misboxed/mislabled service parts.
- [PIT6138](/bulletins/10253105.md), 2024-04-15, Service bulletin: EQUIPMENT:ELECTRICAL. This Preliminary information communicates and issue with the LED right above the wireless charging pad being inoperative and how to resolve the concern with the LED.
- [PIC6486E](/bulletins/10253104.md), 2024-04-15, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary information communicates to dealer that GM is aware of the issue and is working on a resolution.
- [PIT5992A](/bulletins/10253092.md), 2024-04-15, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. This preliminary information discusses a condition that may arise from the drivers window switch sending an errant message causing the vehicle to enter manual fob learn mode.

JSON: [/v1/bulletins/10215627](/v1/bulletins/10215627)

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