2020 Cadillac CT6 Technical Service Bulletins

753 technical service bulletins (TSBs) are on record for the 2020 Cadillac CT6. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11010490Oct 5, 2024Engine. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 11011420Oct 4, 2024Other or unknown. This Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.
• 11010488Oct 3, 2024Other or unknown. This Warranty Administration bulletin provides information on the Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program.
• 11010421Oct 3, 2024Electrical system. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
• 11010495Oct 2, 2024Other or unknown. This bulletin provides information on Warranty Administration – Required Operating Procedures - 8 Points (U.S. Only).
• 11010491Oct 2, 2024Other or unknown. This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
• 11011406Oct 1, 2024Forward collision avoidance. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
• 11009532Sep 27, 2024Engine. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
• 11009531Sep 27, 2024Engine. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
• 11009463Sep 25, 2024Brakes, Wheels, Transmission and drivetrain. This service bulletin provides repair information to correct customer concerns of Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift.
• 11009764Sep 21, 2024Body and structure, Other or unknown. This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
• 11009760Sep 21, 2024Electrical system. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.
• 11009756Sep 17, 2024Engine, Transmission and drivetrain. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
• 11009088Sep 16, 2024Transmission and drivetrain. This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
• 11009039Sep 14, 2024Other or unknown. This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
• 11007744Sep 12, 2024Other or unknown. 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.
• 11007743Sep 12, 2024Other or unknown. 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.
• 11009037Sep 10, 2024Other or unknown. This service bulletin provides information on Enhancing Field Product Reports with Digital Pictures.
• 11008956Sep 9, 2024Other or unknown. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. and Canada Dealers Only).
• 11007208Sep 6, 2024Other or unknown. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
• 11007196Sep 6, 2024Other or unknown, Electrical system. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency…
• 11008898Aug 27, 2024Other or unknown. The bulletin provides direction on how to locate the Temporary Service Part (TSP) form in GlobalConnect.
• 11006621Aug 26, 2024Electrical system. Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined…
• 11007936Aug 22, 2024Suspension. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
• 11007935Aug 22, 2024Suspension. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
• 11008906Aug 19, 2024Engine. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
• 11007721Aug 16, 2024Electrical system, Engine. This service bulletin provides information on AGM batteries that require less frequent charging in storage.
• 11006317Aug 13, 2024Seats. This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
• 11006303Aug 13, 2024Electrical system, Other or unknown. This Preliminary information communicates a vehicle may come to the dealer with Super Cruise inoperative. On inspection the tech will find code B126B. Tech is given direction on how to update the Map module to restore function. Dealer is also given directions to give to customer to ensure they continue to receive updates.
• 11006285Aug 13, 2024Engine. This Preliminary information communicates to the technician a service Diagnostic / Repair tip to avoid causing the crankshaft sprocket to disengage from the crankshaft during crankshaft balancer or cam drive system component related service procedures.
• 11007716Aug 12, 2024Engine. This service bulletin provides information on the new oil filter UPF63R to be used on the HFV6 Engines.
• 11006682Aug 9, 2024Other or unknown. This service bulletin provides information on a guide to help reduce repeat visits for the same customer concern.
• 11007155Aug 8, 2024Engine. This informational bulletin advises the technician that the engine and related parts will be debited if found that the tech did not properly prepare the engine block from dirt and debris in bolt holes or if found that the block was damaged by the tech.
• 11007115Aug 8, 2024Engine. This service bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
• 11007121Aug 7, 2024Engine. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 11007095Aug 7, 2024Fuel system. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
• 11006670Aug 7, 2024Engine. This service bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.
• 11007116Aug 6, 2024Engine, Electrical system. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 11007091Aug 5, 2024Engine. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 11006644Aug 1, 2024Other or unknown. This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 11006511Jul 31, 2024Visibility (wipers, defrost, mirrors). This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic.
• 11006371Jul 26, 2024Other or unknown, Electrical system. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
• 11006278Jul 26, 2024Other or unknown. This service bulletin describes the U.S. Dealer Special Tool Loan Program process.
• 11006421Jul 24, 2024Transmission and drivetrain. GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
• 11006290Jul 24, 2024Engine, Electrical system. This service bulletin provides information to dealership personnel on a new refrigerant (R1234yf) for A/C service.
• 11006377Jul 23, 2024Fuel system. This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence.
• 11006353Jul 23, 2024Engine. This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
• 11006282Jul 22, 2024Wheels. This service bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted Appearance of Chromed Aluminum Wheels.
• 11005339Jul 17, 2024Engine. This service bulletin explains the difference in oil filters for gas engines with new oil pump control systems and the possibilities of what may happen using the incorrect filter.
• 11005311Jul 9, 2024Transmission and drivetrain. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.

← All problems reported for the 2020 Cadillac CT6