2020 Cadillac CT4 Technical Service Bulletins

888 technical service bulletins (TSBs) are on record for the 2020 Cadillac CT4. 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.

• 10181660Sep 2, 2020Transmission and drivetrain. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10179662Aug 31, 2020Equipment, Transmission and drivetrain. This Preliminary information communicates a parts restriction is in place for the Automatic Transmission Control on 2020 Cadillac CT4, and CT5.
• 10180694Aug 28, 2020Electrical system, Exterior lighting. This technical bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated With DTC P037C.
• 10180697Aug 14, 2020Equipment. This Warranty Administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
• 10180317Aug 14, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10180315Aug 12, 2020Electrical system. This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.
• 10213746Aug 10, 2020Brakes, Equipment. Service Update. Certain vehicles may experience a noise from the left front and right rear brake wear sensors during low speed or when the brake is applied lightly. Dealers are to remove pad wear sensors and install a left front and right rear plug.
• 10180293Aug 10, 2020Transmission and drivetrain. 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.
• 10180299Aug 5, 2020Equipment. This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
• 10179623Aug 5, 2020Electrical system, Equipment. This Preliminary Information communication advises the technician that the Radio or Tuner, radio controls, Integrated Center Stack, HUD's, IPC's, and radio displays are placed on restriction through the General Motors Technical Assistance Center. Dealers will need to contact General Motors Technical Assistance Center for further assistance.
• 10179538Jul 30, 2020Electrical system. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the malfunction indicator lamp (MIL) illuminated.
• 10179537Jul 30, 2020Electrical system. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineers listed in regards to no fob detected message on driver information center (DIC), passive and backup inoperative and active functions working for all transmitters.
• 10178392Jul 29, 2020Electrical system, Lane departure. This PI communicates a parts restriction is in effect on 2020 Cadillac CT4, and CT5 Side Blind Zone Module.
• 10178949Jul 28, 2020Engine, Transmission and drivetrain. This Bulletin provides guidelines for Dealers Not Required and 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 for Canadian Dealers only.
• 10178383Jul 24, 2020Back-over prevention (rear camera). This PI communicates a parts restriction is in effect on 2020 cadillac CT4, and CT5 Front View Camera Module.
• 10178377Jul 22, 2020Brakes, Equipment. This Preliminary information communicates that there maybe a squeak or squeal noise caused by contact between the brake pad wear sensor and the rotor.
• 10178961Jul 14, 2020Equipment. This informational bulletin provides information for dealers/technicians on No MIL illuminated, ignore these DTCs if set in History.
• 10178371Jul 13, 2020Electrical system, Forward collision avoidance. This PI communicates a parts restriction is in effect on 2020 cadillac CT4, and CT5 Front View Camera Module.
• 10179408Jul 10, 2020Equipment, Body and structure. This bulletin provides information to dealers regarding transportation damage repair claim submission requirements.
• 10178346Jun 25, 2020Electrical system. This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
• 10178342Jun 23, 2020Electrical system. This Preliminary information communicates that the transfer case control module is on engineering restriction to verify diagnostics and service information.
• 10178288Jun 23, 2020Transmission 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.
• 10178330Jun 16, 2020Electrical system. This Preliminary information communicates to the dealer that programming modules must be done in OFF power module using MDI2 on 2020 Cadillac CT4,CT5, and Chevrolet Corvette.
• 10178293Jun 15, 2020Equipment. This warranty administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
• 10178326Jun 13, 2020Engine cooling. This Preliminary information communicates additional diagnostic tips when diagnosing engine oil leaks on these vehicles.
• 10178318Jun 10, 2020Electrical system, Brakes. This PI communicates a parts restriction is in effect on 2020 Cadillac CT4, CT5 and Chevrolet Corvette Electronic Brake Boost Control Module and Valve Kit, Brake Pressure Modulator.
• 10178295Jun 10, 2020Engine cooling. This engineering information (EI) closure ends the need for information from technicians/field in regards to engine oil found under their vehicle.
• 10178313Jun 9, 2020Forward collision avoidance, Electrical system. This PI communicates a parts restriction is in effect on 2020 cadillac CT4, and CT5 Front View Camera Module.
• 10178310Jun 8, 2020Equipment, Forward collision avoidance. This PI communicates a parts restriction is in effect on 2020 cadillac CT4, and CT5 Front View Camera Module.
• 10178262Jun 8, 2020Electrical system, Equipment. This informational bulletin provides information for dealers/technicians on MDI 2 Required When Programming Vehicles with Vehicle Intelligence Platform (VIP).
• 10178291Jun 2, 2020Equipment. This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
• 10178278Jun 2, 2020Electrical system. This informational bulletin provides information for the technicians to clear DTCs and allow the vehicle to go into sleep mode to correct the Malfunction Indicator Lamp (MIL) Illuminated and to stop DTCs setting.
• 10176337May 29, 2020Electrical system. This PI communicates a parts restriction is in effect on 2020 Cadillac CT4, CT5 and Chevrolet Corvette Amplifier.
• 10176647May 27, 2020Electrical system, Equipment. This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
• 10176643May 26, 2020Electrical system. This informational bulletin provides information for dealers/technicians on the false setting of DTC U0212.
• 10176649May 20, 2020Electrical system. This informational bulletin provides information for the IPC odometer programming method quick reference guide.
• 10176324May 20, 2020Air bags. This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
• 10176320May 19, 2020Electrical system. This Preliminary information communicates to the dealer that programming modules must be done in OFF power module using MDI2 on 2020 Cadillac CT4,CT5, and Chevrolet Corvette.
• 10176319May 19, 2020Electrical system. This Preliminary information communicates to the dealer that programming modules must be done in OFF power module using MDI2 on 2020 Cadillac CT4,CT5, and Chevrolet Corvette.
• 10176639May 18, 2020Transmission and drivetrain. This informational bulletin advises the technician not to replace the prop shaft if a small amount of grease is found leaking out.
• 10207732May 15, 2020Transmission and drivetrain. Service Update. Certain vehicles may have a condition where the transmission enters a neutral state when the internal range sensor (IRS) fault is active. Dealers are to reprogram the transmission control module.
• 10178400May 15, 2020Transmission and drivetrain. Service Update (Population Expansion). Certain vehicles may have a condition where the transmission enters a neutral state when the internal range sensor (IRS) fault is active. Dealers are to reprogram the transmission control module.
• 10176814May 14, 2020Transmission and drivetrain. Service Update - Certain vehicles may have a condition where the transmission enters a neutral state when the internal range sensor (IRS) fault is active. Dealers are to reprogram the transmission control module.
• 10176607May 8, 2020Equipment, Fuel system, Engine. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
• 10176644May 7, 2020Equipment. This informational bulletin provides the dealership with how to prep a vehicle for delivery to the customer to aid in higher CSi scores.
• 10176306May 7, 2020Electrical system. This Preliminary information communicates to the dealer technician that the part numbers for the internal wiring harnesses for the 8 speed RWD transmissions are not listed in the Electronic Parts Catalog. Technicians are to refer to the information provided in this document to obtain the internal wiring harness part numbers by application.
• 10176646May 6, 2020Equipment, Electrical system. This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
• 10176632May 5, 2020Engine, Fuel system. This informational bulletin explains to the tech on how to order a new fuel injector by matching the part number on the part and ordering it from the EPC.
• 10176299May 4, 2020Electrical system, Equipment. This Preliminary Information communication advises the technician that the Radio or Tuner, radio controls, Integrated Center Stack, HUD's, IPC's, and radio displays are placed on restriction through the General Motors Technical Assistance Center. Dealers will need to contact General Motors Technical Assistance Center for further assistance.
• 10175850Apr 29, 2020Equipment, Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).

← All problems reported for the 2020 Cadillac CT4