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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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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
N202310850 022021-03-01. Service bulletin. ELECTRICAL SYSTEM; SEATS; ENGINE AND ENGINE COOLING; EQUIPMENT; AIR BAGS. Customer Satisfaction Program (Revised Service Procedure and Part Ordering Information). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N202310850 Reope2021-03-01. Service bulletin. EQUIPMENT; SEATS; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Customer Satisfaction Program (VINS re-opened, software updated). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N202310850 012021-03-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; AIR BAGS; ENGINE AND ENGINE COOLING; SEATS. Customer Satisfaction Program (Revised Correction, Service Procedure and Warranty Information). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N2023108502021-03-01. Service bulletin. ELECTRICAL SYSTEM; SEATS; EQUIPMENT; AIR BAGS. Customer Satisfaction Program. In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
20NA2382021-02-22. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. This service bulletin provides V153 radio software update information to correct customer concerns of various software issues.
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.
N202317390 012021-02-16. Service bulletin. AIR BAGS; EXTERIOR LIGHTING; SEATS; ELECTRICAL SYSTEM; VEHICLE SPEED CONTROL. Customer Satisfaction Program (Revised Service Procedure). 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.
N202310850 022021-02-16. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; AIR BAGS; EQUIPMENT. Customer Satisfaction Program (Revised Service Procedure and Part Ordering Information). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N202310850 012021-02-16. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; AIR BAGS; ELECTRICAL SYSTEM. Customer Satisfaction Program (Revised Correction, Service Procedure and Warranty Information). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N2023108502021-02-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; AIR BAGS; ENGINE AND ENGINE COOLING. Customer Satisfaction Program. In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
PIT5751C2021-02-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
PIT5789A2021-02-16. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. 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.
PIE0601A2021-02-01. Service bulletin. ELECTRICAL SYSTEM; ENGINE. 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.
PIE0599B2021-02-01. Service bulletin. AIR BAGS; 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 airbag lamp illuminated on the driver?s information center (DIC).
20NA2382021-02-01. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. This service bulletin provides V153 radio software update information to correct customer concerns of various software issues.
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.
20NA1142021-02-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This informational bulletin provides information for dealers/technicians on the false setting of DTC U0212.
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.
N202310850 022021-02-01. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Customer Satisfaction Program (Revised Service Procedure and Part Ordering Information). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N2023108502021-02-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; AIR BAGS. Customer Satisfaction Program. In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
PIT5751C2021-01-25. Service bulletin. ELECTRICAL SYSTEM:WIRING. This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
PIT5789A2021-01-25. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. 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.
N2023173902020-12-21. Service bulletin. EQUIPMENT; SERVICE BRAKES; ELECTRICAL SYSTEM. Customer Satisfaction Program (Programming Suspended/Resumed) - 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.
PIE06012020-12-21. 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.
PIE05972020-12-21. 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.

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