Chevrolet Express 2016–2020 — technical service bulletin
Bulletin 18NA253 · NHTSA communication 10181674 · issued Sep 9, 2020
Technical service bulletin
communication type
Equipment
component
2016–2020
model years
25
vehicle entries
Official summary
This technical bulletin advised the technician to take the vehicle for a test drive to validate a possible normal TCC performance while under heavy specific driving maneuvers.
Vehicles covered
- 2016 Chevrolet Express
- 2017 Chevrolet Express
- 2018 Chevrolet Express
- 2019 Chevrolet Express
- 2020 Chevrolet Express
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
- 2016 Chevrolet Silverado 2500
- 2017 Chevrolet Silverado 2500
- 2018 Chevrolet Silverado 2500
- 2019 Chevrolet Silverado 2500
- 2019 Chevrolet Silverado 4500
- 2016 GMC Savana
- 2017 GMC Savana
- 2018 GMC Savana
- 2019 GMC Savana
- 2020 GMC Savana
- 2016 GMC Sierra 2500
- 2017 GMC Sierra 2500
- 2018 GMC Sierra 2500
- 2019 GMC Sierra 2500
- 2016 GMC Sierra Denali
- 2017 GMC Sierra Denali
- 2018 GMC Sierra Denali
- 2019 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.