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Service bulletins for the 2017 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.

1316 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
PIT5099G2023-12-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PIP5540J2023-01-30. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW:ELECTRICAL HEATING ELEMENT. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
PIT5099F2022-07-25. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
12-01-37-001F2022-07-12. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This service bulletin provides information to dealership personnel on a new refrigerant (R1234yf) for A/C service.
PIT5099E2020-08-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
17NA1862020-03-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Technical bulletin provides a procedure to replace the radio to correct radio personalization settings on the infotainment display and a blank HVAC pop-up selecting HVAC Control settings.
PIC6298A2019-04-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary information communicates to the dealer technician that Engineering is investigating an evaporator freeze condition and not to replace parts if SI diagnostics do not lead to a concern.
PIT5099D2018-11-13. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PIT5099C2018-08-06. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
16-NA-3862018-05-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of loss of driver and/or passenger front HVAC floor duct airflow, or hearing a popping noise from IP area.
PIC62982018-05-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary information communicates to the dealer technician a check procedure to perform if complaint of loss of airflow on 2016 - 2018 Cadillac CT6 and to contact GM technical assistance if the evaporator is confirmed to be freezing.
18NA0962018-05-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:ELECTRICAL. This Bulletin provides information for clearing DTC U016B that was inadvertently set when the Technician was servicing the vehicle.
18NA0522018-05-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This technical bulletin provides a procedure for replacing the auxiliary air conditioning evaporator seal due to warm air bypasses between the evaporator and the seal housing hitting the evaporator temperature sensor causing a false reading.
120137001B2018-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This informational bulletin provides information to dealership personnel on a new refrigerant (R-1234yf) for A/C service.
PIC6218A2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that when adjusting the Heater-Vent-Air Conditioning controls the Heater-Vent-Air Conditioning display is blank and/or various selections missing from radio Settings menu intermittently. Technicians will find the Heater-Vent-Air Conditioning does change but the lower radio display is blank. Technician will need to update the radio using Service Programming System with the latest software.
PIC6218B2017-08-15. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. This Preliminary Information communication provides information to the technician about vehicles that when adjusting the Heater-Vent-Air Conditioning controls the Heater-Vent-Air Conditioning display is blank and/or various selections missing from radio Settings menu intermittently. Technicians will find the Heater-Vent-Air Conditioning does change but the lower radio display is blank. Technician will need to update the radio using Service Programming System with the latest software.
16-NA-1922016-10-12. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. THIS TECHNICIAL BULLETIN PROVIDES INFORMATION ON TESTING THE ACCM DUE TO SMALL AMOUNT OF OIL WEEPING INCLUDING THE CORRECT CLEANERS TO USE FOR THE OIL/DYE.

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