Chevrolet 6500 2017–2020 — technical service bulletin
Bulletin 18NA361 · NHTSA communication 10168193 · issued Oct 14, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2020
model years
30
vehicle entries
Official summary
This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
Vehicles covered
- 2019 Chevrolet 6500
- 2019 Chevrolet Duplicate Silverado 5500
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
- 2019 Chevrolet Silverado 1500
- 2020 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
- 2020 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
- 2019 GMC Sierra 1500
- 2020 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
- 2020 GMC Sierra 3500
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.