Buick Enclave 2019–2021 — technical service bulletin

Bulletin 20NA196 · NHTSA communication 10183198 · issued Oct 27, 2020

Technical service bulletin

communication type

Electrical System

component

2019–2021

model years

vehicle entries

Official summary

This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes.

Vehicles covered

2019 Buick Enclave
2020 Buick Enclave
2021 Buick Encore
2020 Buick Encore GX
2021 Buick Encore GX
2020 Cadillac CT4
2021 Cadillac CT4
2020 Cadillac CT5
2021 Cadillac CT5
2019 Cadillac CT6
2020 Cadillac CT6
2021 Cadillac Escalade NA
2019 Cadillac XT4
2020 Cadillac XT4
2021 Cadillac XT4
2020 Cadillac XT5
2021 Cadillac XT5
2020 Cadillac XT6
2021 Cadillac XT6
2019 Chevrolet Blazer
2020 Chevrolet Blazer
2021 Chevrolet Blazer
2020 Chevrolet Bolt EV
2019 Chevrolet Camaro
2020 Chevrolet Camaro
2021 Chevrolet Camaro
2019 Chevrolet Colorado
2020 Chevrolet Colorado
2021 Chevrolet Colorado
2020 Chevrolet Corvette
2019 Chevrolet Cruze
2019 Chevrolet Equinox
2020 Chevrolet Equinox
2021 Chevrolet Equinox
2019 Chevrolet Malibu
2020 Chevrolet Malibu
2021 Chevrolet Malibu
2019 Chevrolet Silverado 1500
2020 Chevrolet Silverado 1500
2021 Chevrolet Silverado 1500
2019 Chevrolet Silverado 2500
2021 Chevrolet Silverado 2500
2021 Chevrolet Silverado 3500
2019 Chevrolet Silverado 4500
2019 Chevrolet Spark
2020 Chevrolet Spark
2021 Chevrolet Spark
2021 Chevrolet Suburban
2021 Chevrolet Tahoe
2021 Chevrolet Trailblazer
2019 Chevrolet Traverse
2020 Chevrolet Traverse
2019 Chevrolet Trax
2020 Chevrolet Trax
2021 Chevrolet Trax
2020 GMC Acadia
2019 GMC Canyon
2020 GMC Canyon
2021 GMC Canyon
2019 GMC Sierra 1500

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.