This informational bulletin provides a way for the technician to identify if the ECM has been modified.
Chevrolet technical service bulletin 20NA090 for 2020-2022 Chevrolet Silverado 1500, 2020-2022 Chevrolet Tahoe and 2021-2022 GMC Sierra 1500 and others.
- Bulletin number
- 20NA090
- Component
- Engine and engine cooling: engine: engine control module (ecu/ECM): software
- Summary
- This informational bulletin provides a way for the technician to identify if the ECM has been modified.
Owners of these vehicles have filed 3,103 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 1500 2020-2022 202020212022
- Chevrolet Tahoe 2020-2022 202020212022
- GMC Sierra 1500 2021-2022 20212022
- Chevrolet Suburban 2020-2022 202020212022
- GMC Yukon 2020-2022 202020212022
- Chevrolet Silverado 2500 2019-2022 2019202020212022
- GMC Yukon XL 2020-2022 202020212022
- GMC Sierra 2500 2019-2021 201920202021
- Cadillac Escalade 2020, 2022 20202022
- GMC Sierra 3500 2021 2021
- Cadillac Escalade ESV 2020-2022 202020212022
- Cadillac Escalade Na 2021 2021
- Chevrolet 3500 2021-2022 20212022
- Chevrolet 5500HD 2021-2022 20212022
- Chevrolet Silverado 4500 2019-2022 2019202020212022
- Chevrolet Silverado 6500 2021 2021
- Chevrolet 6500HD 2022 2022
VIN decoder
See the problems and recalls for an exact car
Buying a used Chevrolet Silverado 1500?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history