Service bulletins for the 2020 Cadillac XT4
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.
758 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| PIP5814 | 2023-01-30. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary information communicates that there some service parts released to dealers missing software. |
|---|---|
| 21-NA-135 | 2023-01-25. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content. |
| 22-NA-115 | 2023-01-25. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND 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. |
| 22-NA-257 | 2023-01-06. Service bulletin. WHEELS. This service bulletin provides information on Dealer Installed LPO Wheel Installation and Return Process. |
| 09-00-89-008F | 2023-01-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 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. |
| 21-NA-124 | 2023-01-06. Service bulletin. ENGINE AND ENGINE 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. |
| 18-NA-073 | 2023-01-06. Service bulletin. ENGINE AND ENGINE 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. |
| 16-NA-338 | 2023-01-05. Service bulletin. POWER TRAIN; ENGINE AND 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. |
| 22-NA-247 | 2022-12-24. Service bulletin. SERVICE BRAKES, HYDRAULIC. This service bulletin provides information to dealership personnel that after performing a brake inspection, brake pad replacement, or any other repair that requires the caliper piston to be reseated may be causing DTC C05B0 to falsely set for eBoost applications. |
| 22-NA-244 | 2022-12-21. Service bulletin. EQUIPMENT. This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period. |
| PIT3271N | 2022-12-12. Service bulletin. WHEELS; TIRES. 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. |
| 22-NA-238 | 2022-12-07. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides diagnostic/repair information to correct a customer concern of Cellphone not Charging or USB Receptacle Inoperative. |
| PIE0720A | 2022-12-07. Service bulletin. POWER TRAIN. This engineering information (EI) closure ends the need to gather further information from technicians in regards to Vehicle Will Not Move When in Drive, Neutral and/or Reverse and DTCs P0746, P0747 Set. |
| 21-NA-212 | 2022-12-07. Service bulletin. SEATS. This service bulletin provides information for dealers/technicians on Front Seat Adjuster Track Service Part Availability Separate from Complete Seat Cushion Frame Assembly. |
| 20-NA-138 | 2022-12-06. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. 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. |
| 22-NA-074 | 2022-12-03. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system. |
| 15-NA-087 | 2022-11-03. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This technical bulletin advises the technician to rest the MIL and diagnose additional DTCs for why the code is setting and disabling the start/stop system. |
| 22-NA-205 | 2022-11-02. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides information on Module Harvesting. |
| 22-NA-203 | 2022-11-02. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. This technical bulletin provides a procedure to correct the condition of Check Engine Lamp Illuminated on Driver Information Center (DIC) with DTC P0451 Set. |
| PIE0720 | 2022-10-28. Service bulletin. POWER TRAIN. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Vehicle Will Not Move When in Drive, Neutral and/or Reverse and DTCs P0746, P0747 Set. |
| 99-00-89-019X | 2022-10-28. Service bulletin. STRUCTURE. This Warranty Administration bulletin provides information on the Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program. |
| 10-00-89-006I | 2022-10-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This service bulletin provides information for dealers on how to submit a product information report (PIR) (Canada Only). |
| PIC5453D | 2022-10-17. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information communication provides information to the technician that General Motors and General Motors of Canada Company do not support cross border sales. The General Motors of Canada Customer Care Centre is the sole authorized provider of a certification confirmation letter which helps our customers identify if their vehicles meets the required USA regulatory standards necessary for importation into the USA. |
| PIT5698C | 2022-10-17. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus. |
| PIP5621C | 2022-10-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN. 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.