Service bulletins for the 2019 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.
832 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Electrical system are shown. Show all
| 21NA124 | 2021-07-06. Service bulletin. ELECTRICAL SYSTEM. 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. |
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| 20NA132 | 2021-05-03. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements. |
| PIT5745B | 2021-04-19. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw. |
| PIT5790A | 2021-02-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates a concern where the radio will reboot when adjusting the volume intermittently and that engineering is investigating |
| 20NA224 | 2021-02-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. This service bulletin provides a procedure to inspect the A/C compressor failure due to a combination of low refrigerant and/or PAG oil to correct a condition of Air Conditioning Blows Warm Air and/or Does Not Get Cold. |
| 16NA019 | 2021-02-01. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares. |
| 1308116001F | 2020-12-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them. |
| 20NA196 | 2020-11-30. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes. |
| PIP5675F | 2020-11-16. Service bulletin. ELECTRICAL 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. |
| 20NA171 | 2020-10-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This technical bulletin provides repair information to correct a customer concern of software issues with Radio Software Version V808. |
| 20NA157 | 2020-10-26. Service bulletin. EQUIPMENT; ELECTRICAL 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. |
| 20NA171 | 2020-09-28. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This technical bulletin provides repair information to correct a customer concern of software issues with Radio Software Version V808. |
| 20NA157 | 2020-09-28. Service bulletin. ELECTRICAL 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. |
| 20NA063 | 2020-09-28. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of SD Card Removed Error Message Displayed on Instrument Panel Cluster (IPC). |
| PIP5675E | 2020-08-10. Service bulletin. ELECTRICAL 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. |
| PIT5745 | 2020-08-10. Service bulletin. ELECTRICAL SYSTEM; SEATS. This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw. |
| 20NA132 | 2020-08-10. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements. |
| 19NA010 | 2020-08-10. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:ADAS:HUD:SOFTWARE. This informational bulletin provides information for dealers/technicians on Head-Up Display (HUD) on Vehicles Model Year 2017 and Newer Having Rotational Feature that Allows for Adjusting of Angle of HUD Image. |
| 070849020Q | 2020-06-22. Service bulletin. ELECTRICAL SYSTEM. This informational bulletin provides information for the IPC odometer programming method quick reference guide. |
| 060089029T | 2020-06-22. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; 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. |
| 060089029S | 2020-06-22. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; 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. |
| 20NA088 | 2020-05-26. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID; ENGINE; ELECTRICAL SYSTEM. This technical bulletin provides a diagnostic procedure to correct a condition of Vehicle Will Not Start and/or Starter Inoperative or Not Disengaging. |
| 19NA076 | 2020-05-26. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Blue Screen and Service Rear Vision System Message on Radio Display. |
| 19NA184 | 2020-04-27. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of a front exterior lighting malfunction. |
| 20NA067 | 2020-04-27. Service bulletin. ELECTRICAL SYSTEM. This informational bulletin provides information for dealers/technicians on Accessory Rear Seat Infotainment (RSI) Shuts Off, Coinciding with Closing of Door or Liftgate. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.