Cadillac CT4 2021–2022 — technical service bulletin
Bulletin 21-NA-106 · NHTSA communication 10230601 · issued Jan 6, 2023
Technical service bulletin
communication type
Power Train
component
2021–2022
model years
41
vehicle entries
Official summary
This service bulletin provides information for the technician that may experience a condition when after performing a DTC Clear/Reset on the TCM during diagnosis or after completion of a transmission repair or replacement, the DTCs did not clear or appear to reset on the next engine start.
Vehicles covered
- 2021 Cadillac CT4
- 2022 Cadillac CT4
- 2021 Cadillac CT5
- 2022 Cadillac CT5
- 2021 Cadillac Escalade
- 2022 Cadillac Escalade
- 2021 Cadillac Escalade Esv
- 2022 Cadillac Escalade Esv
- 2021 Cadillac Escalade NA
- 2021 Chevrolet Camaro
- 2022 Chevrolet Camaro
- 2021 Chevrolet Colorado
- 2022 Chevrolet Colorado
- 2021 Chevrolet Express
- 2022 Chevrolet Express
- 2021 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 1500
- 2021 Chevrolet Silverado 2500
- 2022 Chevrolet Silverado 2500
- 2021 Chevrolet Silverado 3500
- 2022 Chevrolet Silverado 3500
- 2021 Chevrolet Suburban
- 2022 Chevrolet Suburban
- 2021 Chevrolet Suburban 1500
- 2022 Chevrolet Suburban 1500
- 2021 Chevrolet Tahoe
- 2022 Chevrolet Tahoe
- 2021 GMC Canyon
- 2022 GMC Canyon
- 2021 GMC Savana
- 2022 GMC Savana
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
- 2021 GMC Sierra 2500
- 2022 GMC Sierra 2500
- 2021 GMC Sierra 3500
- 2022 GMC Sierra 3500
- 2021 GMC Yukon
- 2022 GMC Yukon
- 2021 GMC Yukon XL
- 2022 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.