This informational bulletin explains how the regen works for the DEF system and how it works at different...
Chevrolet technical service bulletin 20NA203 for 2018-2022 Chevrolet Silverado 1500, 2018-2022 GMC Sierra 1500 and 2018-2022 Chevrolet Silverado 2500 and others.
- Bulletin number
- 20NA203
- Component
- Engine and engine cooling: engine: diesel
- 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 3,021 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 1500 2018-2022 20182019202020212022
- GMC Sierra 1500 2018-2022 20182019202020212022
- Chevrolet Silverado 2500 2018-2022 20182019202020212022
- GMC Sierra 2500 2018-2022 20182019202020212022
- Chevrolet Silverado 3500 2018-2022 20182019202020212022
- GMC Sierra 3500 2018-2022 20182019202020212022
- GMC Sierra Denali 2018-2020 201820192020
- Chevrolet Silverado 5500 2019-2021 201920202021
- Chevrolet Silverado 4500 2019-2022 2019202020212022
- Chevrolet Silverado 6500 2019, 2021-2022 201920212022
- Chevrolet 6500 2019 2019
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