Cadillac CT4 2022–2023 — technical service bulletin
Bulletin PIP5887 · NHTSA communication 10226381 · issued Oct 18, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2022–2023
model years
14
vehicle entries
Official summary
This Preliminary information communicates the possibility of a normal balance shaft gear whine noise to exist in the engine and is normally most audible at or above 1500rpm. This noise does not create any reliabilty or durability issues with the engine.
Vehicles covered
- 2022 Cadillac CT4
- 2023 Cadillac CT4
- 2022 Chevrolet Silverado 1500
- 2023 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 2500
- 2023 Chevrolet Silverado 2500
- 2022 Chevrolet Silverado 3500
- 2023 Chevrolet Silverado 3500
- 2022 GMC Sierra 1500
- 2023 GMC Sierra 1500
- 2022 GMC Sierra 2500
- 2023 GMC Sierra 2500
- 2022 GMC Sierra 3500
- 2023 GMC Sierra 3500
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.