Chevrolet Express 2016–2021 — technical service bulletin

Bulletin 21-NA-199 · NHTSA communication 10217111 · issued Jul 26, 2022

Technical service bulletin

communication type

Power Train

component

2016–2021

model years

vehicle entries

Official summary

This informational bulletin advises the technician to replace the TBV if the transmission has any type of repair even if no problem was found, to replace the tbv.

Vehicles covered

2021 Chevrolet Express
2016 Chevrolet Silverado 1500
2017 Chevrolet Silverado 1500
2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado 1500
2020 Chevrolet Silverado 1500
2021 Chevrolet Silverado 1500
2020 Chevrolet Silverado 2500
2021 Chevrolet Silverado 2500
2020 Chevrolet Silverado 3500
2021 Chevrolet Silverado 3500
2016 Chevrolet Suburban
2017 Chevrolet Suburban
2018 Chevrolet Suburban
2019 Chevrolet Suburban
2020 Chevrolet Suburban
2016 Chevrolet Tahoe
2017 Chevrolet Tahoe
2018 Chevrolet Tahoe
2019 Chevrolet Tahoe
2020 Chevrolet Tahoe
2021 GMC Savana
2016 GMC Sierra 1500
2017 GMC Sierra 1500
2018 GMC Sierra 1500
2019 GMC Sierra 1500
2020 GMC Sierra 1500
2021 GMC Sierra 1500
2020 GMC Sierra 2500
2021 GMC Sierra 2500
2020 GMC Sierra 3500
2021 GMC Sierra 3500
2016 GMC Yukon
2017 GMC Yukon
2018 GMC Yukon
2019 GMC Yukon
2020 GMC Yukon
2016 GMC Yukon Denali
2017 GMC Yukon Denali
2018 GMC Yukon Denali
2019 GMC Yukon Denali
2016 GMC Yukon Denali XL
2017 GMC Yukon Denali XL
2018 GMC Yukon Denali XL
2016 GMC Yukon XL
2017 GMC Yukon XL
2018 GMC Yukon XL
2019 GMC Yukon XL
2020 GMC Yukon XL

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.