# Service bulletins for the 2026 Cadillac Lyriq 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. 165 bulletins from NHTSA, as of 2026-10-19. - [PIT6457C](/bulletins/11038136.md), 2026-10-05, 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. - [PIC6540K](/bulletins/11038132.md), 2026-10-05, Service bulletin: UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio. - [PIT6368E](/bulletins/11037797.md), 2026-10-02, 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. - [PIT5698F](/bulletins/11037555.md), 2026-09-30, Service bulletin: UNKNOWN OR OTHER. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it. - [PIT6426C](/bulletins/11037446.md), 2026-09-22, 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. - [PIC6629F](/bulletins/11037320.md), 2026-09-16, Service bulletin: UNKNOWN OR OTHER. This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display - [PIT6544](/bulletins/11037256.md), 2026-09-10, Service bulletin: UNKNOWN OR OTHER. This preliminary information is to inform technicians and customers that GM is aware of the issue and the vehicle can still be driven. When a repair is available, this PI will be updated. - [PIP4902W](/bulletins/11037253.md), 2026-09-10, Service bulletin: UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance. - [PIT6533B](/bulletins/11036715.md), 2026-09-02, Service bulletin: UNKNOWN OR OTHER. This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts. - [PIT6541](/bulletins/11036690.md), 2026-09-02, 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 - [PIC6551C](/bulletins/11036392.md), 2026-08-27, Service bulletin: UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues - [PIT6533A](/bulletins/11036222.md), 2026-08-17, Service bulletin: UNKNOWN OR OTHER. This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts. - [PIC6658](/bulletins/11036197.md), 2026-08-14, 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. - [PIT6368D](/bulletins/11036195.md), 2026-08-14, 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. - [PIT6512A](/bulletins/11036194.md), 2026-08-14, Service bulletin: UNKNOWN OR OTHER. This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement. - [662.60](/bulletins/11035439.md), 2026-08-01, Over\-the\-air update: UNKNOWN OR OTHER. • Improvements to Super Cruise disengagement alerts. • Improvements to the availability of Super Cruise. • Improvements to driver attention monitoring to help reduce unnecessary OnStar escalation calls. • Improvements to Super Cruise lane merging performance. • Improvements to the responsiveness of rear view camera display. • Improvements to the performance of Brake Assist. • Fixes to help ensure proper Super Cruise lane change functionality. •Improved visuals for Lane Keep Assist feature - [662.40](/bulletins/11035438.md), 2026-08-01, Over\-the\-air update: UNKNOWN OR OTHER. • Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics - [662.20](/bulletins/11035436.md), 2026-08-01, Over\-the\-air update: UNKNOWN OR OTHER. • Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your vehicle's cameras. • Security Recording, a new feature that can automatically begin recording if your vehicle's alarm is triggered while it is parked. • Cabin Glance, a new feature that displays a live feed of the seating area on your infotainment screen. This allows you to check on passengers, such as kids or pets. • Fixes to help ensure responsiveness for the driver display and rear view camera. • Improvements to reliability for alerts and chimes. - [662.50](/bulletins/11035435.md), 2026-08-01, Over\-the\-air update: UNKNOWN OR OTHER. • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One\-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display messages - [PIT6446A](/bulletins/11035351.md), 2026-07-30, Service bulletin: UNKNOWN OR OTHER. This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used. - [PIT5099J](/bulletins/11035340.md), 2026-07-29, Service bulletin: UNKNOWN OR OTHER. PI to help diagnose A/C concern - [PIP6021D](/bulletins/11035130.md), 2026-07-21, Service bulletin: UNKNOWN OR OTHER. This Preliminary Information communicates that, under certain conditions, a MIL \(Malfunction Indicator Lamp\) illumination or a "Service High Voltage" message may display on the IPC \(Instrument Panel Cluster\), and the 12V battery may experience discharge. - [PIT5966F](/bulletins/11034769.md), 2026-07-07, Service bulletin: UNKNOWN OR OTHER. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message. - [N25\-252332](/bulletins/11034038.md), 2026-06-24, Over\-the\-air update: UNKNOWN OR OTHER. • Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi\-Fi, Navigation, and Super Cruise. - [PIC6552G](/bulletins/11034024.md), 2026-06-22, Service bulletin: UNKNOWN OR OTHER. This Preliminary information communicates how to recover the Image Processing Module. 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