# 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.

- Type: Service bulletin
- NHTSA id: 10183198
- Published by NHTSA: 2020\-11\-30
- Manufacturer's number: 20NA196
- Manufacturer's date: 2020\-10\-27
- NHTSA component: ELECTRICAL 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183198-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183198-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2019 to 2020 BUICK ENCLAVE
- 2021 BUICK ENCORE
- 2020 to 2021 BUICK ENCORE GX
- 2020 to 2021 CADILLAC CT4
- 2020 to 2021 CADILLAC CT5
- 2019 to 2020 CADILLAC CT6
- 2021 CADILLAC ESCALADE NA
- 2019 to 2021 CADILLAC XT4
- 2020 to 2021 CADILLAC XT5
- 2020 to 2021 CADILLAC XT6
- 2019 to 2021 CHEVROLET BLAZER
- 2020 CHEVROLET BOLT EV
- 2019 to 2021 CHEVROLET CAMARO
- 2019 to 2021 CHEVROLET COLORADO
- 2020 CHEVROLET CORVETTE
- 2019 CHEVROLET CRUZE
- 2019 to 2021 CHEVROLET EQUINOX
- 2019 to 2021 CHEVROLET MALIBU
- 2019 to 2021 CHEVROLET SILVERADO 1500
- 2019 CHEVROLET SILVERADO 2500
- 2021 CHEVROLET SILVERADO 2500
- 2021 CHEVROLET SILVERADO 3500
- 2019 CHEVROLET SILVERADO 4500
- 2019 to 2021 CHEVROLET SPARK
- 2021 CHEVROLET SUBURBAN
- 2021 CHEVROLET TAHOE
- 2021 CHEVROLET TRAILBLAZER
- 2019 to 2020 CHEVROLET TRAVERSE
- 2019 to 2021 CHEVROLET TRAX
- 2020 GMC ACADIA
- 2019 to 2021 GMC CANYON
- 2019 to 2021 GMC SIERRA 1500
- 2019 GMC SIERRA DENALI
- 2019 to 2021 GMC TERRAIN
- 2021 GMC YUKON
- 2021 GMC YUKON XL

## Recalls for the same vehicles and component

- [24V812000](/recalls/nhtsa/24V812000.md), 2024-10-31: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY THERMAL:MANAGEMENT:SOFTWARE; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [24V481000](/recalls/nhtsa/24V481000.md), 2024-06-27: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [21V650000](/recalls/nhtsa/21V650000.md), 2021-08-20: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [21V421000](/recalls/nhtsa/21V421000.md), 2021-06-10: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE
- [20V790000](/recalls/nhtsa/20V790000.md), 2020-12-17: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [20V489000](/recalls/nhtsa/20V489000.md), 2020-08-18: ELECTRICAL SYSTEM:SOFTWARE; STRUCTURE:BODY:TRUNK LID
- [20V461000](/recalls/nhtsa/20V461000.md), 2020-08-06: ELECTRICAL SYSTEM:SOFTWARE; LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK
- [2019631](/recalls/tc/2019631.md), 2019-12-12: Electrical
- [19V888000](/recalls/nhtsa/19V888000.md), 2019-12-12: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES

## Other bulletins for the same vehicles and component

- [N252515590](/bulletins/11027795.md), 2026-01-27, Service campaign: ELECTRICAL SYSTEM. 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\-007](/bulletins/11025552.md), 2025-11-15, Service bulletin: ENGINE; ELECTRICAL SYSTEM. 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\-202](/bulletins/11024496.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard \(NACS\) DC Adapter Warranty Claim Information.
- [23\-NA\-170](/bulletins/11024486.md), 2025-10-25, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
- [23\-NA\-201](/bulletins/11024378.md), 2025-10-21, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. 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\-119](/bulletins/11024331.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. 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\-180](/bulletins/11024324.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [PIE0753I](/bulletins/11023388.md), 2025-09-30, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. 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\-161](/bulletins/11023368.md), 2025-09-27, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY/WIPER. This informational bulletin provides information for dealers/technicians on power folding mirrors do not fold at the same speed.
- [18\-NA\-180](/bulletins/11023365.md), 2025-09-26, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.

JSON: [/v1/bulletins/10183198](/v1/bulletins/10183198)

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