This informational bulletin provides a way for the technician to identify if the ECM has been modified.
Chevrolet technical service bulletin 20-NA-090 for 2020-2024 Chevrolet Silverado 1500, 2021-2024 Chevrolet Tahoe and 2020-2024 GMC Sierra 1500 and others.
- Bulletin number
- 20-NA-090
- Component
- Electrical system
- Summary
- This informational bulletin provides a way for the technician to identify if the ECM has been modified.
Owners of these vehicles have filed 1,573 complaints in the electrical category.
Vehicles covered
- Chevrolet Silverado 1500 2020-2024 20202021202220232024
- Chevrolet Tahoe 2021-2024 2021202220232024
- GMC Sierra 1500 2020-2024 20202021202220232024
- Chevrolet Suburban 2021-2022, 2024 202120222024
- GMC Yukon 2021-2024 2021202220232024
- Chevrolet Silverado 2500 2020-2024 20202021202220232024
- GMC Yukon XL 2021-2023 202120222023
- GMC Sierra 2500 2020-2024 20202021202220232024
- Cadillac Escalade 2021-2024 2021202220232024
- Chevrolet Silverado 3500 2020-2024 20202021202220232024
- GMC Sierra 3500 2020-2024 20202021202220232024
- Cadillac Escalade ESV 2021-2023 202120222023
- Chevrolet Silverado 5500 2019-2021, 2023-2024 20192020202120232024
- Chevrolet Silverado 4500 2019-2024 201920202021202220232024
- Chevrolet Silverado 6500 2019, 2021-2023, 2025 20192021202220232025
- Chevrolet 6500 2019 2019
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