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Service bulletins for the 2021 GMC Yukon XL

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.

1234 on file from NHTSA, as of 2026-10-19.

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By component

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
PIT5779D2021-02-16. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5779C2021-02-16. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5776B2021-02-16. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the power liftgate inoperative and engineering working on the issue.
PIT5779B2021-02-16. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5787A2021-02-16. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets turning off during an Auto Stop event, which is normal operation.
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.
PIT5779E2021-01-25. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5779D2021-01-25. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5779C2021-01-25. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5776B2021-01-25. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the power liftgate inoperative and engineering working on the issue.
PIT5779B2021-01-25. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
PIT5787A2021-01-25. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets turning off during an Auto Stop event, which is normal operation.
060089031F2020-12-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.
20NA0782020-12-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN:CLUTCH ASSEMBLY; EQUIPMENT. This technical bulletin provides a procedure to replace the 4 5 6 clutch housing if the bushing was found worn and the cause of the customers concern.
PIT58002020-12-14. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES; POWER TRAIN. This Preliminary information communicates and issues with Fuse F49 blowing causing a SES MIL and a Service Theft Deterrent System message displayed in the DIC. It instructions dealership to inspect the 12 volt power accessory port for shorting out.
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.
20NA1892020-10-26. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Transmission Control Module Offline Event.
16NA0192020-10-26. Service bulletin. POWER TRAIN. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
PIT57792020-10-19. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering is working on a new cal.
PIT5762B2020-10-19. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION:SHIFT PATTERN INDICATOR. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues with modules Engineering is working on a fix
PIT57702020-10-19. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the Transmission Control Module (TCM) not communicating and causing a no crank concern. Dealers are to reprogram the TCM to correct the concern.
16NA3612020-09-28. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This informational bulletin explains possible normal condition of a flare from 1st to 2nd, even if the trans had been repaired for the flare and its still noticed.
PIT5762A2020-09-14. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; EQUIPMENT. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues with modules Engineering is working on a fix
PIT57642020-09-14. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; EQUIPMENT. This Preliminary information communicates how to shift the transmission into neutral for various service procedures.
PIT57622020-09-14. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues with modules Engineering is working on a fix

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