Cadillac CT4 2020–2022 — technical service bulletin
Bulletin 21NA091 · NHTSA communication 10205548 · issued Nov 17, 2021
Technical service bulletin
communication type
Equipment
component
2020–2022
model years
35
vehicle entries
Official summary
This service bulletin provides information for customers/dealers/technicians on Normal Rearview Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Rear View Camera Display.
Vehicles covered
- 2020 Cadillac CT4
- 2020 Cadillac CT5
- 2021 Cadillac CT5
- 2020 Cadillac Escalade
- 2020 Cadillac Escalade Esv
- 2021 Cadillac Escalade Esv
- 2021 Cadillac Escalade NA
- 2020 Cadillac XT4
- 2021 Cadillac XT4
- 2020 Chevrolet 3500
- 2021 Chevrolet 3500
- 2022 Chevrolet 3500
- 2020 Chevrolet Bolt EV
- 2020 Chevrolet Corvette
- 2021 Chevrolet Corvette
- 2020 Chevrolet Silverado 1500
- 2021 Chevrolet Silverado 1500
- 2020 Chevrolet Silverado 2500
- 2021 Chevrolet Silverado 2500
- 2022 Chevrolet Silverado 2500
- 2020 Chevrolet Suburban
- 2021 Chevrolet Suburban
- 2020 Chevrolet Tahoe
- 2021 Chevrolet Tahoe
- 2020 GMC Sierra 1500
- 2021 GMC Sierra 1500
- 2020 GMC Sierra 2500
- 2021 GMC Sierra 2500
- 2022 GMC Sierra 2500
- 2021 GMC Sierra 3500
- 2022 GMC Sierra 3500
- 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.