TSB: CADILLAC 3500, 5500HD, 6500HD, ESCALADE, ESCALADE ESV, SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 4500HD, SILVERADO 6500HD, SUBURBAN, TAHOE, YUKON, YUKON XL (2019–2022)

Bulletin 20NA090 — May 4, 2020

Bulletin Details

Bulletin ID20NA090
ManufacturerCADILLAC
Models3500, 5500HD, 6500HD, ESCALADE, ESCALADE ESV, SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 4500HD, SILVERADO 6500HD, SUBURBAN, TAHOE, YUKON, YUKON XL
Model Years2019–2022
Date IssuedMay 4, 2020
Date Added to NHTSAJune 21, 2022
ComponentENGINE AND ENGINE COOLING
Vehicles Affected103 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

This informational bulletin provides a way for the technician to identify if the ECM has been modified.

Affected Vehicles

MakeModelYearComponent
CHEVROLET 3500 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET 3500 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET 5500HD 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET 5500HD 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET 6500HD 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET 6500HD 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CADILLAC ESCALADE 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CADILLAC ESCALADE 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CADILLAC ESCALADE ESV 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CADILLAC ESCALADE ESV 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC SIERRA 1500 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC SIERRA 1500 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 1500 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 1500 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 2500 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 2500 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 4500HD 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 4500HD 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SUBURBAN 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SUBURBAN 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET TAHOE 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET TAHOE 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC YUKON 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC YUKON 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC YUKON XL 2022 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC YUKON XL 2022 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET 3500 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET 3500 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET 5500HD 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET 5500HD 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CADILLAC ESCALADE 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CADILLAC ESCALADE 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CADILLAC ESCALADE ESV 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CADILLAC ESCALADE ESV 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC SIERRA 1500 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC SIERRA 1500 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC SIERRA 2500 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
GMC SIERRA 2500 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC SIERRA 2500 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC SIERRA 3500 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC SIERRA 3500 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 1500 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
CHEVROLET SILVERADO 1500 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 1500 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 2500 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
CHEVROLET SILVERADO 2500 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 2500 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 4500HD 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 4500HD 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 6500HD 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 6500HD 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SUBURBAN 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SUBURBAN 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET TAHOE 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET TAHOE 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC YUKON 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC YUKON 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC YUKON XL 2021 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC YUKON XL 2021 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CADILLAC ESCALADE 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CADILLAC ESCALADE 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CADILLAC ESCALADE ESV 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CADILLAC ESCALADE ESV 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC SIERRA 2500 2020 060000 ENGINE AND ENGINE COOLING
GMC SIERRA 2500 2020 110000 ELECTRICAL SYSTEM
GMC SIERRA 2500 2020 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
GMC SIERRA 2500 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC SIERRA 2500 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 1500 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 1500 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 2500 2020 060000 ENGINE AND ENGINE COOLING
CHEVROLET SILVERADO 2500 2020 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 2500 2020 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
CHEVROLET SILVERADO 2500 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 2500 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 4500HD 2020 060000 ENGINE AND ENGINE COOLING
CHEVROLET SILVERADO 4500HD 2020 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 4500HD 2020 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
CHEVROLET SILVERADO 4500HD 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 4500HD 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SUBURBAN 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SUBURBAN 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET TAHOE 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET TAHOE 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC YUKON 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC YUKON 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC YUKON XL 2020 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC YUKON XL 2020 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
GMC SIERRA 2500 2019 060000 ENGINE AND ENGINE COOLING
GMC SIERRA 2500 2019 110000 ELECTRICAL SYSTEM
GMC SIERRA 2500 2019 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
GMC SIERRA 2500 2019 356000 EQUIPMENT ADAPTIVE/MOBILITY
GMC SIERRA 2500 2019 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 2500 2019 060000 ENGINE AND ENGINE COOLING
CHEVROLET SILVERADO 2500 2019 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 2500 2019 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
CHEVROLET SILVERADO 2500 2019 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 2500 2019 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
CHEVROLET SILVERADO 4500HD 2019 060000 ENGINE AND ENGINE COOLING
CHEVROLET SILVERADO 4500HD 2019 110000 ELECTRICAL SYSTEM
CHEVROLET SILVERADO 4500HD 2019 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
CHEVROLET SILVERADO 4500HD 2019 356000 EQUIPMENT ADAPTIVE/MOBILITY
CHEVROLET SILVERADO 4500HD 2019 061610 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

Related CADILLAC Recalls

CampaignModelYearComponentSummary
CTS 2016 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
ATS 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
ESCALADE 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
SRX 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
SRX 2016 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized CADILLAC dealer. Bring this bulletin ID (20NA090) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.