Buick Envision 2020–2021 — technical service bulletin
Bulletin 20NA123 · NHTSA communication 10191205 · issued Mar 8, 2021
Technical service bulletin
communication type
Electrical System
component
2020–2021
model years
19
vehicle entries
Official summary
This service bulletin provides repair information to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated with DTCs U1961, U1983 setting.
Vehicles covered
- 2021 Buick Envision
- 2020 Cadillac CT4
- 2021 Cadillac CT4
- 2020 Cadillac CT5
- 2021 Cadillac CT5
- 2020 Cadillac Escalade
- 2020 Cadillac Escalade Esv
- 2021 Cadillac Escalade Esv
- 2021 Cadillac Escalade NA
- 2020 Chevrolet Corvette
- 2021 Chevrolet Corvette
- 2020 Chevrolet Suburban
- 2021 Chevrolet Suburban
- 2020 Chevrolet Tahoe
- 2021 Chevrolet Tahoe
- 2020 GMC Yukon
- 2021 GMC Yukon
- 2020 GMC Yukon XL
- 2021 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.