Service bulletins for the 2021 Cadillac CT4
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
813 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Latches and locks are shown. Show all
| 22-NA-200 | 2023-05-06. Service bulletin. ELECTRICAL SYSTEM; LATCHES/LOCKS/LINKAGES. This service bulletin provides repair information to correct a customer concern of Child Safety Lock Update failure. |
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| 18-NA-279 | 2023-02-23. Service bulletin. EXTERIOR LIGHTING; LATCHES/LOCKS/LINKAGES; EQUIPMENT. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 22-NA-200 | 2023-02-21. Service bulletin. EQUIPMENT; LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of Child Safety Lock Update failure. |
| 18-NA-279 | 2023-02-07. Service bulletin. LATCHES/LOCKS/LINKAGES. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 22-NA-200 | 2022-11-02. Service bulletin. ELECTRICAL SYSTEM; LATCHES/LOCKS/LINKAGES:DOORS:LOCK. This service bulletin provides repair information to correct a customer concern of Child Safety Lock Update failure. |
| 18NA279 | 2021-07-19. Service bulletin. LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 18NA279 | 2021-07-06. Service bulletin. LATCHES/LOCKS/LINKAGES. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.