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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.

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By component

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
17408 (Bulletin2018-05-07. Service bulletin. POWER TRAIN. 17408 - Service Update - Potential turbo turbine wheel failure/MIL illuminated with DTC P0299 or P16E7. Dealers are to reprogram ECM with a new calibration.
PIP5486A2018-01-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 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.
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.
16-NA-3382017-08-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This Bulletin provides guidelines for Dealers required to contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns.
16-NA-1752017-08-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This technical bulletin provides a procedure to flush and drain fluids for the transmission to eliminate a shake and/or shudder during a light throttle acceleration between 48 and 104 KM/H (30 and 65 MPH) at a steady state.
PIP5213D2017-08-15. Service bulletin. POWER TRAIN. This Preliminary Information communication advises the technician that the part restriction on the 8L45/8L90 8 speed and the LCT1000 6 Speed Allison automatic transmission has ended.
PIP5213C2017-08-15. Service bulletin. POWER TRAIN. This Preliminary Information communication advises the technician that the LCT1000 6 Speed Allison, 8L90 and 8L45 8 speed automatic transmission as well as the transmission control module is on restriction through General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
16-NA-1752017-08-15. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to flush and drain fluids for the transmission to eliminate a shake and/or shudder during a light throttle acceleration between 40 and 128 KM/H (25 and 80 MPH) at a steady state.
16-NA-0192017-08-15. Service bulletin. POWER TRAIN. This informational buleltin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares and information on transmission fast learns
156672017-01-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 15667 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO CHECK AND ADJUST TRANSMISSION FLUID LEVELS ON THE VEHICLES LISTED ABOVE. THESE VEHICLES MAY EXPEL EXTRA TRANSMISSION FLUID OUT OF A VENT FITTING AND HOSE ON THE TOP OF THE TRANSMISSION.
444702017-01-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. 44470 - CUSTOMER SATISFACTION PROGRAM. CERTAIN 2016 MODEL YEAR CHEVROLET CAMARO AND CADILLAC CT6 VEHICLES, EQUIPPED WITH AN 8-SPEED AUTOMATIC TRANSMISSION (RPO M5T OR M5N), MAY HAVE BEEN BUILT WITH AN INCORRECTLY MACHINED TORQUE CONVERTER PRESSURE PLATE. OVER TIME, THIS CONDITION COULD RESULT IN A SHUDDER OR VIBRATION, FLUCTUATIONS ON THE TACHOMETER AND POSSIBLE TORQUE CONVERTER FAILURE. REPLACE THE TRANSMISSION.
16-NA-2072017-01-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT; POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFT; EQUIPMENT:ELECTRICAL. THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPLACE A SHIFTER CABLE TO CORRECT THE CUSTOMERS CONCERN OF A VIBRATION AND/OR NOISE FROM THE SHIFTER ASSEMBLY DURING AGGRESSIVE DRIVING AND PARKING MANEUVERS WHEN WARM.
PIP54122016-10-21. Service bulletin. POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN ON THE STEPS TO DIAGNOSE THE INTERMITTENT NOISE OF CENTER BEARING SLINGER AND RUBBER BEARING SUPPORT. TECHNICIAN IS DIRECTED TO REPLACE PROPELLER SHAFT.
16NA0192016-10-07. Service bulletin. POWER TRAIN. THIS TECHNICAL BULLETIN PROVIDES THE PROCEDURES TO COMPLETE A TRANSSMISSION ADAPTIVE LEARN ON ALL THE DIFFERENT TYPES OF VEHICLES AND TRANSMISSIONS BASED ON RPO OPTIONS TO CORRECT A CONDITION OF HARSH SHIFTS ON HARD ACCELLERATIONS.
SB-03-07-29-004K2016-08-06. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. THIS INFORMATIONAL BULLETIN PROVIDE INFORMATION ON THE OPERATING CHARACTERISTICS OF A MANUAL TRANSMISSION.

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