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Service bulletins for the 2027 Cadillac Optiq

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.

18 on file from NHTSA, as of 2026-10-19.

By type

Bulletins, newest first
PIC66662026-10-14. Service bulletin. UNKNOWN OR OTHER. This PI states an issue may exist with the liftgate spoiler contacting the body creating a noise.
PIT6457C2026-10-05. Service bulletin. UNKNOWN OR OTHER. This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
PIC6540K2026-10-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6368E2026-10-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener. Engineering is working on a new module.
PIT5698F2026-09-30. Service bulletin. UNKNOWN OR OTHER. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
PIC66652026-09-29. Service bulletin. UNKNOWN OR OTHER. This PI communicates a condition may exist where the paint is peeling near the headlamp on the front fascia.
PIC6645A2026-09-22. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information provides a repair direction for an inoperative amplifier module due to water intrusion.
PIT6426C2026-09-22. Service bulletin. UNKNOWN OR OTHER. If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.
PIP4902W2026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT65412026-09-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication
662.102026-08-31. Over-the-air update. UNKNOWN OR OTHER. • Minor infotainment system improvements
PIT65342026-08-27. Service bulletin. UNKNOWN OR OTHER. Onstar connectivity features may be inoperative. Dealer is instructed how to reset the onstar module. Engineering is investigating a solution.
PIC6656A2026-08-27. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician the direction needed when encounter a noise complaint for the rear disc brakes.
PIC66612026-08-27. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician a diagnostic tip when they encounter a condition that involves the tail lights staying on after the vehicle has been turned off.
PIC66582026-08-14. Service bulletin. UNKNOWN OR OTHER. This preliminary information informs customers and technicians of the short term work around to restore the proper Themes operation. No parts should be replaced at this time.
PIT6517C2026-08-05. Service bulletin. UNKNOWN OR OTHER. This PI advise dealers If U3000 is present, follow the correct service doc by Symptom Byte before contacting PQC; if not present, verify the camera is clean, then contact PQC if no issue is found.
PIC66562026-07-30. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician the direction needed when encounter a noise complaint for the rear disc brakes.
PIC66552026-07-21. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician the direction needed when encountering an issue with pinch point protection is inoperative on the front windows.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.