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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
16NA3702018-05-21. Service bulletin. 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.
16NA3382018-05-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. 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.
15-NA-0692018-05-21. Service bulletin. EQUIPMENT. This informational bulletin provides information for technicians on the reuse of fasteners and the proper reading of torque specifications.
00-03-10-006L2018-05-21. Service bulletin. TIRES; TIRES:TREAD/BELT; TIRES:BEAD; WHEELS:RIM. This informational bulletin provides additional information to the technician on how to check for Tire Radial Force Variations and the difference between balancing a flange and flangeless rim.
15-06-03-002A2018-05-21. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT:ELECTRICAL. This informational bulletin provides information to dealership personnel regarding original equipment battery part numbers and AC Delco replacement battery approved warranty part numbers.
10-00-89-005E2018-05-21. Service bulletin. ELECTRICAL SYSTEM:WIRING. This warranty administration bulletin adds the 2016 model year to a communication which provides dealership personnel revised wiring repair labor operations and required additional information.
PIP5486C2018-05-21. Service bulletin. ENGINE. 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.
PIP4112S2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. This Preliminary Information communication provides information to the technician of a complaint of a sag or hesitation when accelerating. The concern is present when coasting at low speeds of less than 15 miles per hour and then aggressively applying the throttle, or after making a hard stop followed by an aggressive throttle. This concern may also be present while crusing at highway speeds and then an aggressive increase in throttle.This is considered normal operation of the vehicle the throttle is delayed and opened slowly up to .7 seconds to help minimize driveline lash and clunking or will have approximately .5 seconds of zero torque to allow the transmission to shift to downshift.
PIP5493F2018-05-21. Service bulletin. ENGINE. 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. Also difining calibration update information.
GCUS-3-6322018-05-07. Service bulletin. ENGINE AND ENGINE COOLING. 44120 - Customer Satisfaction Program - Certain vehicles, equipped with an 8-speed automatic transmission, may have a condition in which the 2-3-4-6-8 Clutch Piston is out of specification. Parts as installed exhibited a crack condition as cast after machining. As a result the vehicle could exhibit 1-2 upshift slipping or a flaring condition.
PI14402018-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This preliminary informational bulletin provides technicians with diagnostic tips for a customer concern of odor emanating from HVAC system.
09-00-89-016D2018-05-07. Service bulletin. EQUIPMENT. This warranty administration bulletin provides retail and wholesale service personnel with the policies and the warranty claims submission procedures that support Labor Operation 0600014 ? Suspected Tampering or Vehicle Modifications.
PIE03852018-05-07. 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.
16NA3562018-05-07. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This technical bulletin provides a procedure to clear the codes and re-evaluate the XM radio channels to correct a condition of audio muting when listening to some Sirius XM channels but if they change channels they will find others that experience normal audio. This could be due to interference from transmitting sources outside of Sirius XM?s frequency range.
16NA3552018-05-07. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES. this informational bulletin provides Information on Using MyBuick, MyCadillac, MyChevrolet, and MyGMC Phone Applications to Control GM Accessory Remote Start Kits.
16NA3492018-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This technical bulletin provides a procedure to check the EAT sensor by firmly pressing the sensor into place and listen for a "click", validating the sensor is into place and correcting the customers concern of poor A?C performance.
16NA3422018-05-07. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to check the rearview mirror coax connector for looseness by disconnecting and reconnecting the electrical connector and to correct the customers concern for the rearview mirror video screen displaying blue.
16NA3412018-05-07. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides multiple fixes for a condition of a waiting for update screen appearing on the display, due to either a reprogramming of the hmi module or due to a fuse that needs to be pulled and restarting of the module.
16NA3382018-05-07. Service bulletin. POWER TRAIN. This Bulletin provides guidelines for Dealers to determine whether or not they need to contact the PQC for an engine, transmission or transfer case assembly replacement and information explaining the PQC process, Global Warranty Management Transaction submission, vehicle repair record retention and proper handling of assembly returns.
16NA3172018-05-07. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES. This informational bulletin provides information on the proper ways to remove or replace the key cylinder covers due to somevehicleshavingthe key cylinders hidden during the time of delivery.
16NA2662018-05-07. Service bulletin. EXTERIOR LIGHTING. This technical bulletin provides a procedure to update the ECM to the latest software and calibration available to correct a customer concern that the Malfunction Indicator Lamp is illuminated and/or the remote start will not start the vehicle due to a voltage spike in the ECM, above the threshold value which will set the code P0132 or P223E.
150603002D2018-05-07. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT. Original Equipment Batteries Part Number and ACDelco Replacement Battery Approved Warranty Part Numbers
150603002C2018-05-07. Service bulletin. EQUIPMENT. This informational bulletin provides information on approved warranty part numbers for original equipment batteries
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.
100844006D2018-05-07. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Informational Bulletin provides information for customers to report Missing or Inaccurate navigation Radio Map Disc information.

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