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
| PIE0595 | 2020-12-07. Service bulletin. STRUCTURE. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to paint concerns with the front and/or rear fascias. |
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| PIE0592 | 2020-12-07. Service bulletin. ELECTRICAL SYSTEM. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards one or more camera views showing, intermittent behavior and/or totally inoperative. |
| 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. |
| 060089026Q | 2020-12-07. Service bulletin. EQUIPMENT. This warranty administration bulletin provides information on Warranty Administration - Customer Concern Not Duplicated (CCND) Labor Operation Numbers. |
| 050604022R | 2020-12-07. Service bulletin. FUEL SYSTEM, DIESEL. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL. |
| N202317390 | 2020-11-30. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE; EQUIPMENT. Customer Satisfaction Program - Certain vehicles may have a condition in which the brake system control module (BSCM) may set and latch an internal fault in the module?s on-board diagnostics (OBD) buffer. When the fault is present, no malfunction indicator lamp (MIL) is illuminated and there is no driver information center (DIC) message. If an over the air (OTA) software update is pushed to an OBD module and the customer accepts it through the Infotainment system, the update will fail because the presence of the active fault will block the OTA update. The customer may notice that the OTA update has failed with an error message on the DIC. This fault is not visible through dealer tools. Dealers are to reprogram the BSCM. |
| 20NA204 | 2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM. This technical bulletin provides a procedure to program the ECM if found the cause of the customers concern. |
| 20NA201 | 2020-11-30. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE. This technical bulletin provides repair information to correct a customer concern of Liftgate Unwanted Opening Due to Hands-Free Calibration Sensitivity. |
| 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. |
| 20NA160 | 2020-11-30. Service bulletin. EQUIPMENT:ELECTRICAL. This service bulletin provides information for dealers/technicians on Normal Characteristic - Wireless Phone Projection Audio Cuts Out Every 10 Seconds on New/Unsold Vehicles. |
| 18NA103 | 2020-11-30. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP. This service bulletin provides information to correct a customer concern of an in-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated. |
| 16NA380 | 2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin provides a procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe. |
| 16NA222 | 2020-11-30. Service bulletin. ENGINE. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations. |
| PIT5776A | 2020-11-16. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE:BODY:HATCHBACK/LIFTGATE. This Preliminary information communicates an issue with the power liftgate inoperative and engineering working on the issue. |
| PIT5789 | 2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP; ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering is working on releasing updated BCM cals to correct the concern. |
| PIT5788 | 2020-11-16. Service bulletin. ELECTRICAL 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. |
| PIT5759H | 2020-11-16. Service bulletin. AIR BAGS. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting caused by high resistance at the F106DA Driver's front seat inboard air bag connector. Dealers are to replace the F106DA Driver's front seat inboard air bag connector pigtail. |
| PIT5759G | 2020-11-16. Service bulletin. SEATS. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting caused by high resistance at the F106DA Driver's front seat inboard air bag connector. Dealers are to replace the F106DA Driver's front seat inboard air bag connector pigtail. |
| PIT5787 | 2020-11-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates an issue with the 110 volt power outlets turning off during an Auto Stop event, which is normal operation. |
| PIT5786 | 2020-11-16. Service bulletin. EQUIPMENT. This Preliminary information communicates how to enable the power retractable assist steps during PDI. |
| PIT5759F | 2020-11-16. Service bulletin. AIR BAGS. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting caused by high resistance at the F106DA Driver's front seat inboard air bag connector. Dealers are to replace the F106DA Driver's front seat inboard air bag connector pigtail. |
| PIT5773B | 2020-11-16. Service bulletin. SEATS. This Preliminary information communicates an issue with the 3rd Row Seat Headrest not returning to the upright position after cycling the seat and to install a headrest repair kit. |
| PIT5766 | 2020-11-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates there is a Part Restriction for the Automatic Leveling Control Module and to contact the PQC to order the part. |
| PIT5779A | 2020-11-16. Service bulletin. EQUIPMENT:ELECTRICAL. 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. |
| PIT5551F | 2020-11-16. Service bulletin. FORWARD COLLISION AVOIDANCE. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert". |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.