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.
By type
By component
By trouble code
By topic
| 21-NA-082 | 2022-04-01. Service bulletin. STRUCTURE; STRUCTURE:BODY:DOOR. This technical bulletin provides a procedure to install foam on window motors to prevent them from rubbing on the panels causing a noise. |
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| PIE0680 | 2022-03-19. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Driver Headlamp Stays On When Vehicle is Shut Off, Headlamp will Change in Color, Turn Signal Flickers and/or Stays On, GMC Logo Does Not Illuminate. |
| PIE0678B | 2022-03-19. Service bulletin. ELECTRICAL SYSTEM. This Engineering Information (EI) Closure ends the need for further information from the field regarding No Heat from Driver Side Inboard Dash Duct and/or Weak Heat On Driver Side. |
| 22-NA-047 | 2022-03-18. Service bulletin. ENGINE AND ENGINE COOLING. Information bulletin explains a possible coolant leak coming from the cylinder head bolt areas. |
| 21-NA-095 | 2022-03-18. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to seal the exhaust at the UFSCR and Tailpipe flange. |
| 20-NA-219 | 2022-03-18. Service bulletin. UNKNOWN OR OTHER. This technical bulletin provides repair information to correct a customer concern of a gurgle or sloshing noise heard coming from the front sunroof drain hose areas. |
| PIP5840 | 2022-03-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR. This Preliminary information communicates to technicians to modify the camshaft housing cover insulator by removing the stand off identified in the attached pictures. |
| PIT5776C | 2022-03-14. Service bulletin. POWER TRAIN. This Preliminary information communicates an issue with the power liftgate inoperative and engineering working on the issue. |
| PIT5788B | 2022-03-14. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issue with a low or dead battery issue cause by the rear hvac door being jammed by an foreign object. |
| PIP5795 | 2022-03-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary information communicates to technicians to replace the rear cover with seal in the event of a rear oil seal leak. |
| 22-NA-052 | 2022-03-09. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. This service bulletin provides repair information to correct a customer concern of DTC B1038.64 set in the BCM and Door Ajar Message on Driver Information Center (DIC). |
| PIT5762E | 2022-02-14. Service bulletin. COMMUNICATION: VEHICLE TO INFRASTRUCTURE. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues between the modules. |
| PIT5779F | 2022-02-14. 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. |
| PIT5888 | 2022-02-14. Service bulletin. SUSPENSION; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); SERVICE BRAKES, HYDRAULIC. This Preliminary information communicates an issue with the air leveling suspension losing air pressure in very cold temperatures while sitting for several hours. Engineering is working on a fix. |
| PIP5808A | 2022-02-14. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to technicians to replace the ECM and affected sensor if diagnostics leads to replacement of the ECM. |
| PIP5791A | 2022-02-14. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to dealership technicians to perform a sweep of the coolant flow control valve and test the circuits before replacing the Engine Coolant Flow Control Valve, and to assist engineering in root causing the P2B60. |
| PIT5734C | 2022-02-14. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE. This Preliminary information communicates an issue with poor heater performance and advises dealerships to inspect the heater core inlet and outlet hoses for being twisted or kinked. |
| PIT5832A | 2022-02-14. Service bulletin. COMMUNICATION. This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly. |
| PIT5800A | 2022-02-14. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. 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. |
| PIT5885 | 2022-02-14. Service bulletin. AIR BAGS; COMMUNICATION. This Preliminary information communicates an issue with an SIR MIL with DTC B14DC caused by the air bag connector contacting the foam in the drivers seat. Dealer to remove the foam that is contacting the air bag connector. |
| PIT5788A | 2022-02-14. Service bulletin. VEHICLE SPEED CONTROL. This Preliminary information communicates an issue with a low or dead battery issue cause by the rear hvac door being jammed by an foreign object. |
| PIT5481G | 2022-02-14. Service bulletin. LANE DEPARTURE. This Preliminary Information communication provides information to the technician with additional information on the functionality of Lane Keep Assist. Starting with 2016 model year Lane Keep Assist Regular Production Option Code (UHX) replaced Lane Departure Warning Regular Production Option Code (UFL). Lane Keep Assist is designed to assist the driver in keeping the vehicle from drifting out of a driving lane that has clearly identified markings. The electric power steering provides a gentle steering correction if a lane marking has been crossed and the driver has not actively responded. |
| PIT5479E | 2022-02-14. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed. |
| PIT5807A | 2022-02-14. Service bulletin. BACK OVER PREVENTION. This Preliminary information communicates and issue with unwanted content theft alarm going off for no reason and to reprogram the BCM to correct the issue. |
| 21NA287 | 2022-02-14. Service bulletin. SEATS:MID/REAR ASSEMBLY. This technical bulletin provides repair information to correct a customer concern of a sticky comfort adjuster handle release, seat tracks out of sync on left rear 40 % seat. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.