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Service bulletins for the 2018 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.

1096 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
182062018-09-10. Service bulletin. EQUIPMENT. 18206 - Customer Satisfaction Program. Some vehicles may have an owner?s manual that does not show the correct fuse information for the rear compartment fuse block. The label on the rear electrical center fuse block in the vehicle is correct, and does not need to be changed. Customers will receive an owner?s manual insert. Dealers are to print and install owner?s manual inserts.
PIP5568B2018-08-20. Service bulletin. EQUIPMENT. This Preliminary information communicates there is an investigation into cause and correction for this group of DTC's setting together. (P0011, P0014, P0021, P0024).
PIC6095C2018-08-20. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Preliminary Information communication provides information to the technician on how to tell the difference between the integrated center stack, the radio, the human machine interface, and the vehicle communication interface module. There are pictures of all the individual modules for identification purposes.
174792018-08-20. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. 17479 - Customer Satisafaction Program. A software update package is available for vehicles with Super Cruise. The enhanced Super Cruise software will improve lane centering and add descriptive instrument cluster messaging that will allow drivers to better understand why Super Cruise is unavailable or why Super Cruise needs to disengage and return control to the driver. System performance will be enhanced. Easier to Engage Super Cruise. Adaptive Cruise Control provides smoother acceleration and braking behavior. Dealers are to update the Super Cruise software, and provide the customer with an owner manual insert that outlines the new available cluster messaging.
PIC6307L2018-08-06. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary information communicates a parts restriction for the Super Cruise components.
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.
PIC5953D2018-08-06. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary Information communication provides information to the technician about vehicles that may have an issue when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone contacts to not have any Emojis loaded to any contact.
PIT5411M2018-08-06. Service bulletin. EQUIPMENT. This Preliminary Information communication advises the technician that the Human Machine Interface, Radio or Tuner, radio controls, Integrated Center Stack, and displays are placed on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
174792018-08-06. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. 17479 - Customer Satisafaction Program. A software update package is available for vehicles with Super Cruise. The enhanced Super Cruise software will improve lane centering and add descriptive instrument cluster messaging that will allow drivers to better understand why Super Cruise is unavailable or why Super Cruise needs to disengage and return control to the driver. System performance will be enhanced. Easier to Engage Super Cruise. Adaptive Cruise Control provides smoother acceleration and braking behavior. Dealers are to update the Super Cruise software, and provide the customer with an owner manual insert that outlines the new available cluster messaging.
PIC6307K2018-06-18. Service bulletin. EQUIPMENT. This Preliminary information communicates a parts restriction for the Super Cruse components.
PIT5399A2018-06-18. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about connectivity concerns when connecting an Apple device via USB cord. Technician should insure the customer is using an original equipment manufacturer Apple USB cable.
PIP55682018-06-18. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary information communicates there is an investigation into cause and correction for this group of DTC's setting together. (P0011, P0014, P0021, P0024).
PIC6307J2018-06-18. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This Preliminary information communicates a parts restriction for the Super Cruse components.
99-08-51-001D2018-06-11. Service bulletin. STRUCTURE; EQUIPMENT. Thins informational bulletin provides information on Paint-less Dent Repair Process.
17-NA-2132018-06-11. Service bulletin. EQUIPMENT:OTHER:LABELS. This informational bulletin provides information for the service parts identification (SPID) label replacement.
PI1149A2018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This preliminary information bulletin provides a procedure on how to check for the customer concern of a blank radio with/without audio, by checking the the wiring harness, ECU and reprograming the HMI software update, if the wiring or ECU are not the cause.
13-08-116-001C2018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
08-08-44-029H2018-06-11. Service bulletin. EQUIPMENT. This warranty administration bulletin provide policy information on warranty and policy exchange program for electronic products for U.S. and Canada dealers only.
04-00-89-015Q2018-06-11. Service bulletin. EQUIPMENT. This warranty administration bulletin provide policy information on required operating procedures.
180652018-06-04. Service bulletin. WHEELS:HUB; WHEELS; ELECTRICAL SYSTEM; EQUIPMENT. 18065 - Service Update. A splash shield in the right front hand wheel house may have not been installed. Customers may experience a no start condition due to debris and water entering the impacted area covered by the shield. Dealers are to install a splash shield if it is missing. They should also inspect the two ring terminals (starter / ground) within the impacted area for corrosion and clean the area as necessary.
150603002K2018-06-04. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT. This informational bulletin provides information on approved warranty part numbers for original equipment batteries
050851001I2018-06-04. Service bulletin. EQUIPMENT. This information bulletin provides a procedure on how to remove the paint stain that may present itself under the shipping film.
18NA0272018-06-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information retaining to the fact that Service Manuals will now be available on USB.
17NA0742018-06-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This informational bulletin provides information and Tips for Customers Having Difficulty Launching Android Auto or Apple CarPlay.
16NA2392018-06-04. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. This Bulletin provides a procedure to activate/enable 4G LTE Wi-Fi Hotspot on New vehicle.

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