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Service bulletin 20NA196

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 id10183198
Published by NHTSA2020-11-30
Manufacturer's number20NA196
Manufacturer's date2020-10-27
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes.

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

Vehicles listed
BUICK ENCLAVE2019, 2020
BUICK ENCORE2021
BUICK ENCORE GX2020, 2021
CADILLAC CT42020, 2021
CADILLAC CT52020, 2021
CADILLAC CT62019, 2020
CADILLAC ESCALADE NA2021 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC XT42019, 2020, 2021
CADILLAC XT52020, 2021
CADILLAC XT62020, 2021
CHEVROLET BLAZER2019, 2020, 2021
CHEVROLET BOLT EV2020
CHEVROLET CAMARO2019, 2020, 2021
CHEVROLET COLORADO2019, 2020, 2021
CHEVROLET CORVETTE2020
CHEVROLET CRUZE2019
CHEVROLET EQUINOX2019, 2020, 2021
CHEVROLET MALIBU2019, 2020, 2021
CHEVROLET SILVERADO 15002019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002019 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 45002019 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SPARK2019, 2020, 2021
CHEVROLET SUBURBAN2021
CHEVROLET TAHOE2021
CHEVROLET TRAILBLAZER2021
CHEVROLET TRAVERSE2019, 2020
CHEVROLET TRAX2019, 2020, 2021
GMC ACADIA2020
GMC CANYON2019, 2020, 2021
GMC SIERRA 15002019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2019 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2019, 2020, 2021
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
24V8120002024-10-31. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY THERMAL:MANAGEMENT:SOFTWARE; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
24V4810002024-06-27. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
21V6500002021-08-20. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
21V4210002021-06-10. AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE
20V7900002020-12-17. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20V4890002020-08-18. ELECTRICAL SYSTEM:SOFTWARE; STRUCTURE:BODY:TRUNK LID
20V4610002020-08-06. ELECTRICAL SYSTEM:SOFTWARE; LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK
20196312019-12-12. Electrical
19V8880002019-12-12. ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES

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
N2525155902026-01-27. Service campaign. Certain vehicles listed above, may have a condition in which the body-to-chassis ground strap may be corroded. Dealers will replace the ground strap.
22-NA-0072025-11-15. Service bulletin. This service bulletin provides procedures to correct customer concerns of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler (CAC) Icing - Malfunction Indicator Lamp (MIL) Illuminated with DTCs P0299, P0234, P0236, P2227, P00C7 Set.
24-NA-2022025-10-27. Service bulletin. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard (NACS) DC Adapter Warranty Claim Information.
23-NA-1702025-10-25. Service bulletin. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
23-NA-2012025-10-21. Service bulletin. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp (MIL) Illuminated.
23-NA-1192025-10-16. Service bulletin. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in- Park, No Start - DTC B000A Set.
18-NA-1802025-10-16. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
PIE0753I2025-09-30. Service bulletin. This engineering information (EI) will assist GM to recover a small number of electric vehicle battery packs from customer-owned vehicles in the field for further engineering study and analysis.
22-NA-1612025-09-27. Service bulletin. This informational bulletin provides information for dealers/technicians on power folding mirrors do not fold at the same speed.
18-NA-1802025-09-26. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.