2021 Cadillac XT4 Technical Service Bulletins

685 technical service bulletins (TSBs) are on record for the 2021 Cadillac XT4. 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.

• 10234142Mar 20, 2023Engine cooling. This informational bulletin explains why more DEF is being used in diesel engines due to new emission standards.
• 10234110Mar 17, 2023Engine cooling. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
• 10233969Mar 17, 2023Engine cooling. 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.
• 10233835Mar 17, 2023Engine cooling. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 10233830Mar 17, 2023Engine cooling. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
• 10233829Mar 17, 2023Engine cooling. 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.
• 10234222Mar 16, 2023Equipment. This Preliminary information communicates to the technician that GM is aware of this concern with audio loss and the OnStar LED being red. GM is working on a solution to correct this customers concern.
• 10234107Mar 16, 2023Electrical system, Equipment. This service bulletin provides information for dealers on Using EL-52545 When Diagnosing PEPs Transmitter Key Fobs.
• 10234105Mar 16, 2023Engine cooling. This service bulletin explains how to identify possible DEF system contamination.
• 10233831Mar 16, 2023Engine cooling. This service bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
• 10234219Mar 15, 2023Engine cooling. This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
• 10234117Mar 15, 2023Electrical system, Equipment. This service bulletin provides repair information to update radio software to correct customer concerns of Software related issues.
• 10233358Mar 10, 2023Equipment, Electrical system. This service bulletin provides information on AGM batteries that require less frequent charging in storage.
• 10233338Mar 8, 2023Wheels, Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10233336Mar 6, 2023Body and structure. This service bulletin provides repair information to correct a customer concern of the front fascia paint chipping at headlamp opening.
• 10232469Feb 27, 2023Equipment. This Warranty Administration bulletin provides policy information on Causal Part requirements for transactions submitted to GM for payment.
• 10232835Feb 24, 2023Forward 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".
• 10232458Feb 22, 2023Equipment, Back-over prevention (rear camera). This service bulletin provides repair information on release of Radio Software Version V160 Update to correct customer concerns of radio software issues.
• 10232287Feb 21, 2023Equipment. This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
• 10232288Feb 20, 2023Equipment. This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
• 10232283Feb 17, 2023Body and structure, Other or unknown, Visibility (wipers, defrost, mirrors). This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic.
• 10232143Feb 17, 2023Equipment. This warranty administration bulletin provides policy information for variable diagnostic time allowances on select labor operations (U.S. Only).
• 10232275Feb 16, 2023Transmission and drivetrain. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
• 10232815Feb 15, 2023Back-over prevention (rear camera), Engine cooling. This Preliminary information communicates that a rotational clicking noise heard after engine shut down is a design characteristic and no repairs should be attempted.
• 10232157Feb 15, 2023Engine cooling, Transmission and drivetrain. This service bulletin advises the tech that the rotational Clicking Noise Heard After Engine Shut Down may be normal characteristics of the vehicle.
• 10232136Feb 15, 2023Exterior lighting. This service bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Water Leaks and Replacement Guidelines.
• 10232811Feb 10, 2023Equipment. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
• 10232069Feb 10, 2023Equipment, Latches, locks and linkages, Exterior lighting. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
• 10232070Feb 7, 2023Equipment, Electrical system. This service bulletin provides repair information to correct a customer concern of Blue or Black Screen and Service Rear Vision System Message on Radio Display Shifting into Reverse.
• 10232793Feb 6, 2023Back-over prevention (rear camera). This Preliminary information communicates diagnostics aids for rear view camera issues that may be encountered.
• 10231893Feb 1, 2023Electrical system, Engine cooling. This service bulletin provides information for U.S. dealers ONLY to refer to the Battery Maintenance Report to identify vehicles in dealer inventory that require attention.
• 10231891Feb 1, 2023Engine cooling, Transmission and drivetrain. This service bulletin provides information on a normal characteristic of a transmission that will not shift into overdrive range during cold ambient temperatures.
• 10231519Jan 31, 2023Wheels, Tires, Equipment. This service bulletin provides information for tire pressure monitoring (TPM) system concerns.
• 10231518Jan 31, 2023Equipment, Wheels, Tires. This service bulletin provides information for accurate tire pressures that ensure the safe handling and appropriate ride characteristics of GM cars and trucks.
• 10231520Jan 30, 2023Back-over prevention (rear camera), Equipment. This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Camera Display.
• 10231672Jan 27, 2023Engine cooling. This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
• 10231661Jan 24, 2023Equipment. This Preliminary information communicates to the technician that GM is aware of this concern with audio loss and the OnStar LED being red. GM is working on a solution to correct this customers concern.
• 10231392Jan 20, 2023Electrical system, Equipment. This service bulletin provides repair information to correct a customer concern of Head Up Display (HUD) Blank, Non-Responsive to Brightness, Aim, or Page Controls, DTC U1518 Set.
• 10231364Jan 20, 2023Latches, locks and linkages. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
• 10231302Jan 20, 2023Equipment. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only).
• 10231374Jan 17, 2023Equipment. This warranty administration bulletin provides policy information requirements applicable to key fob replacement under the New Vehicle Limited Warranty or under a Replacement Parts Warranty on 2017-2022 and newer model year vehicles with RPO ATH and AVJ.
• 10230612Jan 13, 2023Electrical system. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
• 10231628Jan 6, 2023Engine cooling. This Preliminary information communicates the possibility of dtc p0299 due to a stuck open Charge Air Bypass Valve
• 10230603Jan 6, 2023Engine cooling, Electrical system. This service bulletin provides information for U.S. dealers ONLY to refer to the Battery Maintenance Report to identify vehicles in dealer inventory that require attention.
• 10228912Dec 23, 2022Wheels. This service bulletin provides information on Dealer Installed LPO Wheel Installation and Return Process.
• 10228906Dec 21, 2022Equipment. This Warranty Administration bulletin provides retail and wholesale service personnel with the policies/procedures and the warranty transaction submission procedures that support the Personal Property Damage process.
• 10230697Dec 15, 2022Visibility (wipers, defrost, mirrors). This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
• 10228888Dec 14, 2022Engine cooling. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
• 10228886Dec 14, 2022Engine cooling. 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.
• 10228863Dec 13, 2022Transmission and drivetrain, Engine cooling. This Warranty Admin service 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.

← All problems reported for the 2021 Cadillac XT4