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Service bulletins for the 2019 Cadillac CT6

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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
010089010M2019-03-18. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information on comebacks prevention information and using customer concern verification sheets (CCVS).
19NA0102019-03-18. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin provides information for dealers/technicians on Information on Head-Up Display (HUD) on Vehicles Model Year 2017 and Newer Has Rotational Feature that Allows for Adjusting of the Angle of the HUD Image.
PIC5650F2019-03-18. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
PIP5545B2019-03-18. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates a possible noise from the water pump causing a DTC and the diagnostics for the repair.
17NA2762019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Loss of Phone Pairing or Favorites, Last Setting of Volume, Station, App, and Audio Settings Change When Vehicle Shuts Down in Demo Mode and that this is considered a normal characteristic of the vehicle in demo mode.
PIC63522019-03-11. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary information communicates to inspect the LVDS cable connections if unable to learn the Night Vision camera.
PIC6342A2019-03-11. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates to the dealer technician that U0100 can currently set for a loss of communications with either the TCCM or the ECM and further diagnostics will be required to determine which module is at fault.
PIT5630B2019-03-11. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates the possible setting of B101D-39 in the OnStar module and advises of byte info to retrieve while engineering completes further investigation.
PIC63422018-12-17. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates to the dealer technician that U0100 can currently set for a loss of communications with either the TCCM or the ECM and further diagnostics will be required to determine which module is at fault.
PIC6048J2018-12-17. Service bulletin. LANE DEPARTURE; SEATS. This Preliminary Information communicates to the technician that some customers may comment on the operation of their haptic seat during a Lane Keep Assist event. Lane Keep Assist works differently than Lane Departure Warning. The Lane Keep Assist icon is solid amber, Forward Camera Module is actively commanding a torque to Electronic Power Steering. This means that the driver should also feel some feedback from the steering wheel. No Chimes or haptic in the seat. Lane Keep Assist icon is flashing amber; Forward Camera Module is actively commanding torque to Electronic Power Steering. This will also be accompanied with Lane Departure Warning chimes and haptic in the seat feedback based on the setting chosen in the vehicle settings. This will take place when the vehicle has crossed lane marking by (40 cm) or (15.75 in).
PIP5593B2018-12-17. Service bulletin. POWER TRAIN. This Preliminary information communicates to the dealer technician that the 10L80 transmission has been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission assembly.
PIC6265D2018-12-17. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL; LANE DEPARTURE. This Preliminary information communicates that a vehicle may exhibit a Adaptive Cruise Control Unavailable and/or Lane Keep Assist Unavailable message. The technician may attempt to program the Active Safety Control Module (ASCM) and encounter a code E4399. The technician is advised if he encounters this concern to zero the MIC counter by placing the vehicle into and back out of "Transport Mode".
PIP5568C2018-12-17. Service bulletin. ENGINE. This Preliminary information communicates there is an investigation into cause and correction for this group of DTC's setting together. (P0011, P0014, P0021, P0024). Revised to include the possibility of setting in pairs and some drivability concerns.
PIC6288A2018-12-17. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Preliminary information communicates a possible P1FFE for a stuck sensor after Repair. This explains that air pocket could cause the sensor to get stuck. It explains the process for resting the sensor float.
PIP5591A2018-12-17. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates advises the technician that the ECM part number will be placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
PIT5630A2018-11-26. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. This Preliminary information communicates the possible setting of B101D-39 in the OnStar module and advises of byte info to retrieve while engineering completes further investigation.
PIC6180A2018-11-13. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER; SEATS. This Preliminary Information communication provides information to the technician with diagnostic tips for auto heated and ventilated seat operation. The auto thermal seats function activates seat heating or ventilation based on outside air temperature and the cabin air temperature control error. The cabin air temperature control error is the difference between cabin air target temperature and actual cabin air temperature.
PIP5486F2018-11-13. Service bulletin. ENGINE. This Preliminary information communicates possible concerns and a diagnostic strategy to locate and repair various noises within the engine as well as some misfire causes.
PIC6137E2018-10-15. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about vehicles that the engine stops running after extended idle with shifter in park. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. If the customer exits the vehicle with the fob in their possession while the engine is running and the shifter is left in park, the engine will shut off after 1 - 2.5 hours depending on model year. If the customer is sitting in the vehicle with the engine running and the fob is in the vehicle, the Passive Entry Passive Start system will reach out and look for the fob after 1 - 2.5 hours depending on model year. If the fob is located, the timer will reset an additional 1 - 2.5 hours depending on model year.
PIC63392018-10-15. Service bulletin. STEERING; ELECTRICAL SYSTEM. This Preliminary information communicates to the dealer technician the need to disconnect the Steering Column Friction Control Module to correctly diagnose B290A SYM49.
PIT56302018-10-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates the possible setting of B101D-39 in the OnStar module and advises of byte info to retrieve and of engineering investigation.
PIP5486D2018-09-17. Service bulletin. ENGINE. This Preliminary information communicates possible concerns and a diagnostic strategy to locate and repair various noises within the engine as well as some misfire causes.
PIP5493G2018-09-17. Service bulletin. ENGINE. This Preliminary information communicates diagnostic tips for misfires on active fuel management cylinders and engineering investigations into cylinder 6 misfire on XT5 and cylinder 4 misfire on LaCrosse both of which are 2017. Changes to Preliminary informationinclude adding MY2018, advising of calibration for previous investigation and adding pictures to identify concern. Also defining calibration update information.
PIP55752018-09-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This Preliminary information communicates to the dealer technician that the transmission control module P/N24289415 is on restriction through the PQC.

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