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Service bulletins for the 2016 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.

1371 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
17-NA-0992018-05-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This bulletin provides a procedure to replace the crankshaft balancer if found the cause of the customers concerns of noises or sparks.
17-NA-0962018-05-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin explains why the brakes are applying in reverse and to not replace parts but wait for a software update.
17-NA-0932018-05-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin has a procedure to reprogram the HPCM to to correct the customers concern.
17-NA-0732018-05-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides policy information with the field action courtesy transportation policy.
17-NA-0672018-05-21. Service bulletin. ELECTRICAL SYSTEM. This informational bulletin provides information on On rare occasions, a security code input message with SPS error code E5659, M5304, and/or M5530 may be displayed in TIS2web when the technician is programming any module. If this concern is encountered, the technician should start by ensuring that the module being programmed is not a used module and that the VIN matches on VIN plate, TIS2web programming screen, and GDS2 module identification information screen.
17-NA-0662018-05-21. Service bulletin. POWER TRAIN. This warranty administration bulletin provide policy information for automatic transmission Oil Cooler Flush and flow test.
17-NA-0402018-05-21. Service bulletin. SERVICE BRAKES. This technical bulletin provides a procedure to apply copper paste to the brake calipers to correct a condition of Brake Squeal or Squeak Noise Intermittently on Initial Brake Applies.
17-NA-0392018-05-21. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides additional information on what oil to use in the 2.0L engines to eliminate the risk of engine/piston failure.
17-NA-0252018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This technical bulletin is providing a procedure to reprogram the HMI module to correct multiple conditions including Waiting for Update Media Message, Voice Command For Calling Bluetooth Phone Contacts Inoperative, Intermittent Loss of Rear Camera Gridlines, Service Rear Vision System Message, Radio Turns On Unwanted At Startup, and/or Navigation Radio Destination State Defaults To WV, Intermittent Radio/display Resets, Volume Control Inoperative.
16-NA-1292018-05-21. Service bulletin. POWER TRAIN. This informational bulletin advises the technician not to change the crankshaft balancer if it has the illusion of a wobble or vibration appearance.
16-NA-1092018-05-21. Service bulletin. STEERING. This technical bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
06-08-47-001M2018-05-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This information bulletin explains the labor operation numbers used for submitting warranty claims and how to setup, and reprogram modules.
PIE0385A2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING. This engineering information bulletin is requesting information from the field on vehicles that have the concern of a noisy water pump.
16-NA-3892018-05-21. Service bulletin. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin provides a procedure to reprogram the FVCM if the battery has issues that are related to the front camera module.
16-NA-3872018-05-21. Service bulletin. EQUIPMENT; SEATS:FRONT ASSEMBLY:HEAD RESTRAINT; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin provides a procedure to correctly install the j-clips that might have been installed incorrectly during PDI causing a rattle or buzz noise or the rear wheel house liners loose or falling off.
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.
16-NA-3702018-05-21. Service bulletin. EQUIPMENT; VISIBILITY:SUN/MOON ROOF ASSEMBLY. This technical bulletin provides sunroof noise repair information to correct various customer concerns of hearing a rattle, creak, tick, and/or double click noise during sunroof operation.
16-NA-2642018-05-21. Service bulletin. INTERIOR LIGHTING; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to reset the MEC counter to zero and correcting the ambient light status message to read DARK.
16-NA-1972018-05-21. Service bulletin. ELECTRICAL SYSTEM:WIRING; VISIBILITY:SUN/MOON ROOF ASSEMBLY. This technical bulletin provides a procedure for replacing the sunroof wiring jumper harness due to the sunroof glass and/or sunroof sunshade is inoperative.
16-NA-1072018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Technical Bulletin provides a fix to reprogram the radio for vehicles that may experience any of the following conditions: DTC U0184 Set, Radio Inoperative, Blue Screen, AM Clipping Noise, HD On/Off Status Not Retained in Stations, Time Lag on Transitions, No Audio with Internal Amp, Park Assist Symbol Position Wrong in Rear View Camera
03-06-03-004N2018-05-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM. This informational bulletin provides information to dealership personnel regarding warranty codes generated by EL-50313 Midtronics GR8 Battery Tester/Charger required for claim processing on labor operations 4041510, 4041520 and 250 mile/400 km labor operation restriction (North America ONLY).
PIC6296A2018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. This Preliminary Information communication provides information to the technician that when scanning a vehicle for Diagnostic Trouble Codes, may find a temporary loss of Human Machine Interface communication with Global Diagnostic System 2. Technician should not replace the Human Machine Interface for this concern, power cycling of the Human Machine Interface fuse should restore communication. Technician should be advised that the Human Machine Interface and Global Diagnostic System 2 interaction concern has been reported to engineering for root cause and correction.
PIP5163C2018-05-21. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
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.
PIC5932B2018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about customers that may complain of various concerns when using Bluetooth components. Technician should use the Preliminary Information to gather information from the customer on their Bluetooth device and the concern they are having before calling General Motors Technical Assistance Center.

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