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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

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Only bulletins with component: Software are shown. Show all

Bulletins, newest first
20-NA-1322024-04-05. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIP5632G2023-01-30. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP4902Q2023-01-30. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
PIP58142023-01-30. 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.
21NA1272022-06-21. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. This technical 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.
21NA2562022-02-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); EXTERIOR LIGHTING. This service bulletin provides repair information for dealers/technicians to correct a customer concern of a Malfunction Indicator Lamp Illuminated with DTC P26BB Set.
20NA1712021-12-27. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. This service bulletin provides repair information to correct a customer concern of software issues with Radio Software Version V808.
20NA2242021-02-01. 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.
16NA0192021-02-01. 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.
20NA1712020-10-26. 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.
20NA1712020-09-28. 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.
PIC6365A2019-07-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates information to dealers advising certain Over the air updates and USB updates have been temporarily suspended.
070849020P2019-04-22. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information for the IPC odometer programming method quick reference guide.
030846004V2019-04-22. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information on OnStar® VCIM is currently restricted parts. By working closely with our dealers and technicians, through the part restriction process, the General Motors team will gain a better understanding of any field concerns that may develop.
18NA3762019-03-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. This bulletin provides service procedure information for dealers/technicians on Radio Software Version V509 Over-the-Air Update.
17NA2762019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Loss of Phone Pairing or Favorites, Last Setting of Volume, Station, App, and Audio Settings Change When Vehicle Shuts Down in Demo Mode and that this is considered a normal characteristic of the vehicle in demo mode.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.