Buick Envision 2016–2019 — technical service bulletin

Bulletin 18NA201 · NHTSA communication 10198841 · issued May 5, 2021

Technical service bulletin

communication type

Engine and Engine Cooling

component

2016–2019

model years

vehicle entries

Official summary

This technical bulletin provides a procedure to seal the bedplate bolt #621 if found the cause of the oil leak.

Vehicles covered

2016 Buick Envision
2017 Buick Envision
2018 Buick Envision
2019 Buick Envision
2018 Buick Lacrosse
2019 Buick Lacrosse
2016 Buick Regal
2017 Buick Regal
2018 Buick Regal
2019 Buick Regal
2016 Cadillac Ats
2017 Cadillac Ats
2018 Cadillac Ats
2019 Cadillac Ats
2016 Cadillac CT6
2017 Cadillac CT6
2018 Cadillac CT6
2019 Cadillac CT6
2016 Cadillac CTS
2017 Cadillac CTS
2018 Cadillac CTS
2019 Cadillac CTS
2017 Cadillac XT5
2018 Cadillac XT5
2019 Cadillac XT5
2016 Cadillac XTS
2017 Cadillac XTS
2018 Cadillac XTS
2019 Cadillac XTS
2016 Chevrolet Camaro
2017 Chevrolet Camaro
2018 Chevrolet Camaro
2019 Chevrolet Camaro
2016 Chevrolet Equinox
2017 Chevrolet Equinox
2018 Chevrolet Equinox
2019 Chevrolet Equinox
2017 Chevrolet Impala
2018 Chevrolet Impala
2019 Chevrolet Impala
2016 Chevrolet Malibu
2017 Chevrolet Malibu
2018 Chevrolet Malibu
2019 Chevrolet Malibu
2016 Chevrolet Traverse
2017 Chevrolet Traverse
2018 Chevrolet Traverse
2019 Chevrolet Traverse
2016 GMC Acadia
2017 GMC Acadia
2018 GMC Acadia
2019 GMC Acadia
2016 GMC Canyon
2017 GMC Canyon
2018 GMC Canyon
2019 GMC Canyon
2016 GMC Terrain
2017 GMC Terrain
2018 GMC Terrain
2019 GMC Terrain

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.