Chevrolet 6500 2017–2023 — technical service bulletin
Bulletin 23-NA-027 · NHTSA communication 10235765 · issued Apr 20, 2023
Technical service bulletin
communication type
Electrical System
component
2017–2023
model years
36
vehicle entries
Official summary
This technical bulletin provides a procedure to test and replace the high-pressure fuel injector electrical connectors if found the cause of the MIL.
Vehicles covered
- 2019 Chevrolet 6500
- 2019 Chevrolet Duplicate Silverado 5500
- 2017 Chevrolet Silverado 2500
- 2018 Chevrolet Silverado 2500
- 2019 Chevrolet Silverado 2500
- 2020 Chevrolet Silverado 2500
- 2021 Chevrolet Silverado 2500
- 2022 Chevrolet Silverado 2500
- 2023 Chevrolet Silverado 2500
- 2019 Chevrolet Silverado 4500
- 2020 Chevrolet Silverado 4500
- 2021 Chevrolet Silverado 4500
- 2022 Chevrolet Silverado 4500
- 2023 Chevrolet Silverado 4500
- 2019 Chevrolet Silverado 5500
- 2020 Chevrolet Silverado 5500
- 2021 Chevrolet Silverado 5500
- 2023 Chevrolet Silverado 5500
- 2019 Chevrolet Silverado 6500
- 2021 Chevrolet Silverado 6500
- 2022 Chevrolet Silverado 6500
- 2023 Chevrolet Silverado 6500
- 2017 GMC Sierra 2500
- 2018 GMC Sierra 2500
- 2019 GMC Sierra 2500
- 2020 GMC Sierra 2500
- 2021 GMC Sierra 2500
- 2022 GMC Sierra 2500
- 2023 GMC Sierra 2500
- 2017 GMC Sierra 3500
- 2018 GMC Sierra 3500
- 2019 GMC Sierra 3500
- 2020 GMC Sierra 3500
- 2021 GMC Sierra 3500
- 2022 GMC Sierra 3500
- 2023 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.