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Service bulletin 20NA157

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 id10180315
Published by NHTSA2020-09-28
Manufacturer's number20NA157
Manufacturer's date2020-08-12
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.

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 ENCORE2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
BUICK ENCORE GX2020, 2021
BUICK ENVISION2016, 2017, 2018, 2019, 2020
BUICK REGAL2019, 2020
CADILLAC CT42020
CADILLAC CT52020
CADILLAC CT62016, 2017, 2018, 2019, 2020
CADILLAC ESCALADE2015, 2016, 2017, 2018, 2019, 2020
CADILLAC ESCALADE ESV2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC ESCALADE ESV2017, 2018, 2019, 2020
CADILLAC XT42019, 2020, 2021
CADILLAC XT52017, 2018, 2019, 2020
CADILLAC XT62020
CHEVROLET BLAZER2019, 2020
CHEVROLET BOLT EV2017, 2018, 2019, 2020
CHEVROLET CAMARO2016, 2017, 2018, 2019, 2020, 2021
CHEVROLET COLORADO2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET CORVETTE2020
CHEVROLET EQUINOX2018, 2019, 2020, 2021
CHEVROLET IMPALA2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET MALIBU2016, 2017, 2018, 2019, 2020, 2021
CHEVROLET SILVERADO 15002017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002015, 2016, 2017, 2018, 2019, 2020, 2021 (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 SONIC2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET SPARK2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET SPARK EV2014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2015, 2016, 2017, 2018, 2019, 2020, 2021
CHEVROLET TAHOE2015, 2016, 2017, 2018, 2019, 2020, 2021
CHEVROLET TRAILBLAZER2020
CHEVROLET TRAILBLAZER2021
CHEVROLET TRAX2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
GMC ACADIA2017, 2018, 2019
GMC CANYON2015, 2016, 2017, 2018, 2019
GMC SIERRA 15002019 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 15002021 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002021 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2018, 2019
GMC TERRAIN2021
GMC YUKON2015, 2016, 2017, 2018, 2019
GMC YUKON2021
GMC YUKON XL2015, 2016, 2017, 2018, 2019
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
20242942024-05-24. Electrical
21V6500002021-08-20. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
21V5600002021-07-23. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
20214072021-07-01. Electrical
21V4210002021-06-10. AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE
20V7010002020-11-13. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
20V4890002020-08-18. ELECTRICAL SYSTEM:SOFTWARE; STRUCTURE:BODY:TRUNK LID
20V4610002020-08-06. ELECTRICAL SYSTEM:SOFTWARE; LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK

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
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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.
24-NA-0682025-06-16. Service bulletin. This service bulletin provides a procedure to test and replace the battery distribution fuse block if found the cause of the DTC and electric coolant pump inoperative.