This informational bulletin explains how the regen works for the DEF system and how it works at different...
Chevrolet technical service bulletin 20-NA-203 for 2018 Chevrolet Silverado 1500, 2018 GMC Sierra 1500 and 2018-2024 Chevrolet Silverado 2500 and others.
- Bulletin number
- 20-NA-203
- Component
- Engine
- Summary
- This informational bulletin explains how the regen works for the DEF system and how it works at different levels.
Owners of these vehicles have filed 400 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 1500 2018 2018
- GMC Sierra 1500 2018 2018
- Chevrolet Silverado 2500 2018-2024 2018201920202021202220232024
- GMC Sierra 2500 2018-2024 2018201920202021202220232024
- Chevrolet Silverado 3500 2018-2024 2018201920202021202220232024
- GMC Sierra 3500 2018-2024 2018201920202021202220232024
- GMC Sierra Denali 2018 2018
- Chevrolet Silverado 5500 2019-2021, 2023-2024 20192020202120232024
- Chevrolet Silverado 4500 2019-2024 201920202021202220232024
- Chevrolet Silverado LT 2018 2018
- Chevrolet Silverado 6500 2019, 2021-2023, 2025 20192021202220232025
- Chevrolet 6500 2019 2019
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