WenmarOpen by Wenmar Pro

Service bulletins for the 2021 Cadillac XT6

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.

814 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

Bulletins, newest first
21NA0612021-05-10. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This service bulletin provides information for dealers on Using EL-52545 When Diagnosing PEPs Transmitter Key Fobs (North America ONLY).
PIE0616A2021-05-03. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on Service Park Assist Lamp illuminated on the Driver Information Center (DIC).
PIE06162021-05-03. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on Service Park Assist Lamp illuminated on the Driver Information Center (DIC).
PIE0582B2021-05-03. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Head Up Display (HUD) being blank.
20NA1322021-05-03. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
PIE0608A2021-03-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM; EQUIPMENT. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service AWD Lamp illuminated on the Driver Information Center (DIC) and also having multiple DTCs set.
PIE06082021-03-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service AWD Lamp illuminated on the Driver Information Center (DIC) and also having multiple DTCs set.
20NA2372021-02-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
20NA2322021-02-22. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE; ELECTRICAL SYSTEM. This service bulletin provides a service procedure to correct a customer concern of Power Liftgate Stops When Opening and/or Will Not Close from Open Position DTC B153F Sets.
PIC64232021-02-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication requests information from the technician about vehicles that may have Bluetooth or phone projection issues. Dealer should request as much information from the customer on the concern as possible and fill in the questionaire.
20NA2372021-02-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
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.
PIC6420C2021-01-25. Service bulletin. ELECTRICAL SYSTEM:ADAS:VIDEO MONITOR/SCREEN. This Preliminary information communicates information on coax cable connection concerns that can cause a black screen in reverse.
PIC6420B2021-01-25. Service bulletin. ELECTRICAL SYSTEM:ADAS:VIDEO MONITOR/SCREEN. This Preliminary information communicates information on coax cable connection concerns that can cause a black screen in reverse.
PIE0582A2020-12-21. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Head Up Display (HUD) being blank.
PIC6420A2020-12-14. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:VIDEO (TOUCH)SCREEN/MONITOR/UNIT; EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS; ELECTRICAL SYSTEM:ADAS:VIDEO MONITOR/SCREEN. This Preliminary information communicates information on coax cable connection concerns that can cause a black screen in reverse.
PIC64202020-12-14. Service bulletin. ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM. This Preliminary information communicates information on coax cable connection concerns that can cause a black screen in reverse.
1308116001F2020-12-07. 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.
20NA2022020-11-30. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE:BODY:HATCHBACK/LIFTGATE:SUPPORT DEVICE/STRUT. This technical bulletin provides repair information to correct a customer concern of Liftgate Hands-Free Inoperative or Unwanted Opening.
20NA1962020-11-30. 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.
20NA1602020-10-26. Service bulletin. ELECTRICAL SYSTEM. This informational bulletin provides information for dealers/technicians on Normal Characteristic - Wireless Phone Projection Audio Cuts Out Every 10 Seconds on New/Unsold Vehicles.
20NA1572020-10-26. 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.

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