Chevrolet 3500 2014–2022 — technical service bulletin
Bulletin 20-NA-038 · NHTSA communication 10209465 · issued Mar 16, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2014–2022
model years
60
vehicle entries
Official summary
This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence.
Vehicles covered
- 2020 Chevrolet 3500
- 2021 Chevrolet 3500
- 2022 Chevrolet 3500
- 2020 Chevrolet 4500
- 2022 Chevrolet 4500
- 2020 Chevrolet 4500HD
- 2021 Chevrolet 4500HD
- 2022 Chevrolet 4500HD
- 2020 Chevrolet 4500XD
- 2021 Chevrolet 4500XD
- 2022 Chevrolet 4500XD
- 2020 Chevrolet 5500HD
- 2021 Chevrolet 5500HD
- 2022 Chevrolet 5500HD
- 2020 Chevrolet 5500XD
- 2021 Chevrolet 5500XD
- 2022 Chevrolet 5500XD
- 2016 Chevrolet Camaro
- 2017 Chevrolet Camaro
- 2018 Chevrolet Camaro
- 2019 Chevrolet Camaro
- 2020 Chevrolet Camaro
- 2021 Chevrolet Camaro
- 2022 Chevrolet Camaro
- 2014 Chevrolet Corvette
- 2015 Chevrolet Corvette
- 2016 Chevrolet Corvette
- 2017 Chevrolet Corvette
- 2018 Chevrolet Corvette
- 2019 Chevrolet Corvette
- 2020 Chevrolet Corvette
- 2021 Chevrolet Corvette
- 2022 Chevrolet Corvette
- 2018 Chevrolet Express
- 2019 Chevrolet Express
- 2020 Chevrolet Express
- 2021 Chevrolet Express
- 2022 Chevrolet Express
- 2014 Chevrolet Silverado 1500
- 2015 Chevrolet Silverado 1500
- 2016 Chevrolet Silverado 1500
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
- 2019 Chevrolet Silverado 1500
- 2020 Chevrolet Silverado 1500
- 2021 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 1500
- 2020 Chevrolet Silverado 2500
- 2021 Chevrolet Silverado 2500
- 2022 Chevrolet Silverado 2500
- 2020 Chevrolet Silverado 3500
- 2021 Chevrolet Silverado 3500
- 2022 Chevrolet Silverado 3500
- 2015 Chevrolet Suburban
- 2016 Chevrolet Suburban
- 2017 Chevrolet Suburban
- 2018 Chevrolet Suburban
- 2019 Chevrolet Suburban
- 2020 Chevrolet Suburban
- 2021 Chevrolet Suburban
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.