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
| PIE0601 | 2020-12-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. 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 Engine Soon Lamp being illuminated. |
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| PIE0599A | 2020-12-21. Service bulletin. AIR BAGS. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the airbag lamp illuminated on the driver?s information center (DIC). |
| PIE0599 | 2020-12-21. Service bulletin. AIR BAGS. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the airbag lamp illuminated on the driver?s information center (DIC). |
| PIE0597 | 2020-12-21. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE; ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the power liftgate inoperative. |
| PIE0592A | 2020-12-21. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:ADAS:HUD:CAMERA/SENSOR. This engineering informational bulletin 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. |
| PI0754D | 2020-12-21. Service bulletin. VISIBILITY:GLASS, SIDE/REAR:CRITICAL FASTENERS; VISIBILITY:GLASS, SIDE/REAR. This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic. |
| 990851001E | 2020-12-21. Service bulletin. EQUIPMENT; STRUCTURE. Thins informational bulletin provides information on Paint-less Dent Repair Process. |
| 060089031F | 2020-12-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification. |
| 030604017O | 2020-12-21. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. This Informational Bulletin provides information on availability of Diesel Fuel additives. |
| 000310002L | 2020-12-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; WHEELS. This service bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted Appearance of Chromed Aluminum Wheels. |
| 20NA219 | 2020-12-21. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY; EQUIPMENT. 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. |
| 20NA218 | 2020-12-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6. |
| 20NA123 | 2020-12-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides repair information to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated with DTCs U1961, U1983 setting. |
| 20NA078 | 2020-12-21. 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. |
| 18NA263 | 2020-12-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provide policy information for variable diagnostic time allowances on select labor operations (U.S. Only). |
| PIT5801 | 2020-12-14. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; SUSPENSION. This Preliminary information communicates an issue with how to properly inspect and ensure the air lines for the air suspension system are fully seated. |
| PIT5782A | 2020-12-14. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This Preliminary information communicates and issue with programming a replacement side object detection module and engineering is working on the issue. |
| PIT5800 | 2020-12-14. 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. |
| PIT5784A | 2020-12-14. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. This Preliminary information communicates and issue with customers misunderstanding weather they need to bluetooth pair the factory provided headphones. |
| PIT5797 | 2020-12-14. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE. This Preliminary information communicates and issue with the hands free liftgate feature being inoperative after the vehicle has been turned off for an extended time. Dealers are to reprogram the BCM to correct this concern. |
| PIT5796 | 2020-12-14. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM; SEATS. This Preliminary information communicates and issue where the drivers memory seat will not move to its full travel and dealers are to perform a SPS setup procedure to the K40D Drivers Seat Adjuster Memory Module. |
| PIT5795 | 2020-12-14. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This Preliminary information communicates and issue with a either a Service Leveling or Service Headlight message displayed on the DIC. When checking for DTC's a U0132 for Lost Communication with K5 Automatic Level Control Module (ALCM) may be set in several modules. When trying to communicate with the Automatic Level Control Module there will be no communication. Engineering is working on a fix. |
| PIT3271K | 2020-12-14. Service bulletin. WHEELS; TIRES. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection. |
| PIT5766A | 2020-12-14. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This Preliminary information communicates there is a Part Restriction for the Automatic Leveling Control Module and to contact the PQC to order the part. |
| PIT5791 | 2020-12-14. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. This Preliminary information communicates a condition where the radio may display a :connection not availale, please call OnStar agent". This bulletin advises that Engineering is working on a software solution that will prevent the message from displaying when listening to non-SXM sources, but still allow the message to display when a loss of connectivity exists and the user is attempting to play Sirius XM. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.