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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
GCUS-3-6722017-12-22. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 45070 - Service Update. Vehicles may have a loose transmission oil cooler line at the radiator which could cause transmission fluid to leak, resulting in a loss of propulsion. Dealers will inspect the installation of the transmission fluid cooler pipe, and if necessary, secure the transmission fluid cooler pipe.
GCUS-3-6702017-12-22. Service bulletin. ENGINE AND ENGINE COOLING. 46310 - Service Update Bulletin. The incorrect upper radiator hose may have been installed during assembly between vehicles equipped with LGX Engines and LGW Engines. Both of these engines have unique upper radiator hoses, and interchanging them may create hose interference with the Air Box, eventually resulting in a coolant leak.
GCUS-3-6522017-12-22. Service bulletin. ENGINE AND ENGINE COOLING. 43880 02 - Service Update Bulletin (Warranty Information section revised). On some vehicles equipped with a start/stop engine control option, the system level interactions related to the transition of run/crank and accessory inputs to the engine control module (ECM) during a crank event are compromised. This results in communication issues between the ECM and the intelligent battery sensor. The check engine light will illuminate and the stop/start system is suspended while the fault is active, resulting in degraded fuel economy.
GCUS-3-6422017-12-22. Service bulletin. ENGINE AND ENGINE COOLING. 49270 - Customer Satisfaction. Certain vehicles, may have a condition in which engine oil may leak into the engine coolant from within the engine oil cooler core. Engine oil in the coolant system may lead to an over-temperature condition. Dealers will inspect the manufacture date of the engine oil cooler and for presence of engine oil in the engine coolant reservoir. The dealer will replace the engine oil cooler if necessary. In rare occurrences, engine replacement may be required.
17-NA-2442017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Information on How to Prevent Inadvertent Vehicle Starting from Key Fob or OnStar Mobile Application and where to locate the information for future use.
17-NA-2422017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides to the tech the new version of SPS that will prompt warnings when trying to reprogram modules that have been already reprogrammed.
17-NA-2262017-12-22. Service bulletin. STEERING. This bulletin provides a procedure to re-torque the steering gears mounting bolts to specifications.
17-NA-1702017-12-22. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin explains the Road Force balancers and what they can do for customer concerns.
16-NA-3612017-12-22. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin explains possible normal condition of a flare from 1st to 2nd, even if the trans had been repaired for the flare and its still noticed.
16-NA-0822017-12-22. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provide policy information for collision towing and transport for Cadillac aluminum vehicles.
11-08-49-001V2017-12-22. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This technical bulletin provides information on Transport Mode On Message Displayed in Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the transport mode message on and off.
04-00-89-015P2017-12-22. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provide policy information on required operating procedures.
00-06-01-026H2017-12-22. Service bulletin. ENGINE. This informational bulletin provides information on intake manifold inspection/replacement after severe internal engine damage.
16-NA-2232017-12-22. Service bulletin. SERVICE BRAKES. This informational bulletin provides information on installing the correct tires for vehicles with the condition of under hard acceleration at higher speeds, the traction control light will flash. Or, they may come in for ABS or general handling/braking concerns.
GCUS-3-5492017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 43190-01 - Service Update. (Revised) This update includes a service procedure to reprogram the Engine Control Module (ECM) on certain 2016 model year Cadillac CT6 vehicles equipped with a 3.0L Twin Turbo (RPO LGW) Engine. Affected vehicles may illuminate the MIL indicator and be found to have DTC P0234 set. The vehicle may not accelerate as quickly compared to before the MIL illuminated. The vehicle is still able to accelerate, but has lesser performance than the Twin Turbo provides. The engine continues to start, idle and function in all other respects normally. This bulletin has been revised to update the service procedure, include a VIN list and add Parts information. Please discard all previous copies of bulletin 43190.
GCUS-3-5382017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 43200 - Service Update. For vehicles equipped with Collision Imminent Braking with Adaptive Cruise Control, in a highly reflective environment, the short range radar data throughput is exceeded which may cause a Service Driver Assist message to be displayed on the driver information center. Dealers are to reprogram the radar sensor module.
GCUS-3-5342017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 43190 - Service Update. This update includes a service procedure to reprogram the Engine Control Module (ECM) on certain 2016 model year Cadillac CT6 vehicles equipped with a 3.0L Twin Turbo (RPO LGW) Engine. Affected vehicles may illuminate the MIL indicator and be found to have DTC P0234 set. The vehicle may not accelerate as quickly compared to before the MIL illuminated. The vehicle is still able to accelerate, but has lesser performance than the Twin Turbo provides. The engine continues to start, idle and function in all other respects normally.
PIP55342017-12-14. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary information communicates additional diagnostics to assist the dealer technician with diagnosing and repairing trouble code P2097.
PIC6235A2017-12-14. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician about vehicles that the navigation system will be unable to enter addresses that contain diacritics using the touch screen. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a solution for this concern.
PIT55992017-12-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. This Preliminary information communicates a false setting of DTCU0121 in the FVCM due to a FVCM software anomaly. Code U0121 will set and be moved to history in the FVCM with each ignition cycle.
PIC3100F2017-12-14. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This Preliminary Information communication provides information to the technician about vehicle's odometer appears to be inaccurate relative to a known distance traveled. Technician should obtain a hand-held GPS unit to test the odometer. If a hand held GPS unit is not available, the only other option is to verify the miles traveled using a surveyor's wheel or a dynamometer.
PIP5493D2017-11-14. Service bulletin. ELECTRICAL SYSTEM. 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.
PIC6290A2017-11-14. Service bulletin. WHEELS; STEERING. This Preliminary information communicates to the dealer that a thump or bump feel or noise may exist on a hard apply of the brakes or when applying the brakes, letting or, then re-applying the brake when the steering wheel is in the straight ahead position. Engineering has investigated and determined to be a normal operating characteristic.
PIT5551B2017-11-14. Service bulletin. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM. This Preliminary information communicatesa "Forward Collision System Reduced" message displayed on the DIC when theForward Automatic Braking has been set to the "Alert" setting. This is normal when theFAB has been set to "Alert".
PIP55292017-11-14. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. This Preliminary information communicates additional diagnosticsand repairto assist in resolving a malfunction indicator lampillumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131 P0137 P0324 P0326 P0331 P0506.

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