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
| 24-NA-239 | 2025-01-30. Service bulletin. ELECTRICAL SYSTEM; SEATS; STRUCTURE:BODY; STEERING; ENGINE. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope. |
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| 21-NA-240 | 2025-01-30. Service bulletin. ENGINE. This service bulletin provides diagnostic repair information to correct an oil leak in the engine. |
| 09-06-04-026Z | 2025-01-23. Service bulletin. ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2. |
| 07-00-89-037U | 2025-01-18. Service bulletin. UNKNOWN OR OTHER. This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs. |
| 20-NA-132 | 2025-01-18. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements. |
| 21-NA-091 | 2025-01-17. Service bulletin. UNKNOWN OR OTHER. This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Camera Display. |
| 18-NA-263 | 2025-01-09. Service bulletin. UNKNOWN OR OTHER. This warranty administration bulletin provide policy information for variable diagnostic time allowances on select labor operations (U.S. Only). |
| 23-NA-064 | 2025-01-03. Service bulletin. ELECTRICAL 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. |
| 21-NA-240 | 2025-01-03. Service bulletin. ENGINE. This service bulletin provides diagnostic repair information to correct an oil leak on top of the engine that may be coming from cam carrier- T-joint area. |
| 22-NA-238 | 2024-12-19. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This service bulletin provides diagnostic/repair information to correct a customer concern of Cellphone not Charging or USB Receptacle Inoperative. |
| 08-07-30-035I | 2024-12-19. Service bulletin. POWER TRAIN. This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid. |
| 21-NA-181 | 2024-12-18. Service bulletin. POWER TRAIN. This service bulletin provides 9th gear operation information to respond to customers that may comment on transmission shift operation. |
| 19-NA-219 | 2024-12-17. Service bulletin. ENGINE. This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue. |
| PIT5962B | 2024-12-12. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This Preliminary information communicates a GM part number for reflective high temperature heat or insulating tape when repairing wiring harnesses. |
| PIT5074Q | 2024-12-12. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information communication provides information to the technician about the use of J-35616-64B terminal test probe, replacement terminals, and terminated leads. The J-35616-64B is the latest test probe released for checking tension or probing the .64 series terminals. The test probe terminal has been released in the terminal repair kit (J-38125-620H) located in Lear Tray 7 part number 963716-2. There are 5 terminated leads in a package part number is 13505346, which can be ordered through your normal General Motors Customer Care and Aftersales parts channel. |
| 21-NA-043 | 2024-12-10. Service bulletin. STRUCTURE:BODY; WHEELS; ENGINE; SERVICE BRAKES; UNKNOWN OR OTHER. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer. |
| PIP6015 | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the dealer a process for accessing the procedure to add attachments to a GM technical assistance case using the dealer case management tool. |
| PIP5621E | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. 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. |
| PIT5551P | 2024-12-05. Service bulletin. FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. 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". |
| 24-NA-239 | 2024-12-05. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope. |
| 23-NA-021 | 2024-12-04. Service bulletin. ENGINE; POWER TRAIN. This service bulletin advises the tech that the rotational Clicking Noise Heard After Engine Shut Down may be normal characteristics of the vehicle. |
| 04-06-01-029K | 2024-12-04. Service bulletin. POWER TRAIN; STEERING; ENGINE. This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules. |
| 24-NA-237 | 2024-12-04. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This tehcnical bulletin provides a procedure to correct the condition of Rear View Camera Black Screen with DTC B395A sym 72. |
| PIT6261 | 2024-12-04. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers GM is working on a solution for outdated Apps |
| 24-NA-229 | 2024-12-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.