Chevrolet 6500 2017–2020 — technical service bulletin
Bulletin 20NA176 · NHTSA communication 10181704 · issued Sep 3, 2020
Technical service bulletin
communication type
Engine
component
2017–2020
model years
26
vehicle entries
Official summary
This technical bulletin provides a procedure to update the GPCM if found the cause of the customers concern.
Vehicles covered
- 2019 Chevrolet 6500
- 2019 Chevrolet Duplicate Silverado 5500
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
- 2017 Chevrolet Silverado 2500
- 2018 Chevrolet Silverado 2500
- 2019 Chevrolet Silverado 2500
- 2020 Chevrolet Silverado 2500
- 2017 Chevrolet Silverado 3500
- 2018 Chevrolet Silverado 3500
- 2019 Chevrolet Silverado 3500
- 2019 Chevrolet Silverado 4500
- 2020 Chevrolet Silverado 4500
- 2020 Chevrolet Silverado 5500
- 2019 Chevrolet Silverado 6500
- 2017 GMC Sierra 1500
- 2018 GMC Sierra 1500
- 2017 GMC Sierra 2500
- 2018 GMC Sierra 2500
- 2019 GMC Sierra 2500
- 2020 GMC Sierra 2500
- 2017 GMC Sierra 3500
- 2018 GMC Sierra 3500
- 2019 GMC Sierra 3500
- 2017 GMC Sierra Denali
- 2018 GMC Sierra Denali
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.