2021 GMC Yukon Technical Service Bulletins

1,240 technical service bulletins (TSBs) are on record for the 2021 GMC Yukon. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10182546Oct 8, 2020Transmission and drivetrain. This Preliminary information communicates to the dealer technician that the 10L80 transmission has been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission assembly.
• 10183203Oct 7, 2020Electrical system, Engine cooling. This technical bulletin provides a procedure to program the ECM if found the cause of the customers concern.
• 10182537Oct 7, 2020Electrical system. This Preliminary information communicates During inspection of the vehicle for an unrelated concern the technician may notice that one or more of the following Cylinder Deactivation Performance DTC(s) P3498, P3499, P349A, P349B, P349C, P349D, P349E, or P349F may be set in history. and not requesting MIL. If any of these DTCs are requesting the MIL, please follow appropriate service information for diagnosis & repair.
• 10183200Oct 5, 2020Body and structure. This technical bulletin provides repair information to correct a customer concern of Liftgate Unwanted Opening Due to Hands-Free Calibration Sensitivity.
• 10182535Oct 5, 2020Engine cooling. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10181724Sep 30, 2020Equipment. This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
• 10181675Sep 29, 2020Body and structure, Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).
• 10181159Sep 22, 2020Engine cooling. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
• 10181158Sep 22, 2020Engine cooling. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10181653Sep 18, 2020Back-over prevention (rear camera), Visibility (wipers, defrost, mirrors). Service Update Bulletin - Certain 2021 model year Chevrolet Suburban, Tahoe, and GMC Yukon vehicles may have a kink in the rear camera washer hose. Dealers will inspect for functionality of the full display mirror (FDM) camera wash, and, if necessary, add a protective sleeve and trim the hose.
• 10181714Sep 17, 2020Transmission and drivetrain, Electrical system. This technical bulletin provides repair information to correct a customer concern of Transmission Control Module Offline Event.
• 10181695Sep 17, 2020Equipment, Electrical system. This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.
• 10181715Sep 15, 2020Steering, Electrical system. This technical bulletin provides repair information to correct a customer concern of Service Power Steering Message Displayed in DIC, DTC?U3000?44 Set.
• 10181696Sep 10, 2020Electrical system. This informational bulletin provides information for dealers/technicians on Normal Characteristic - Wireless Phone Projection Audio Cuts Out Every 10 Seconds on New/Unsold Vehicles.
• 10181705Sep 9, 2020Electrical system, Steering. This technical bulletin provides repair information to correct a customer concern of Service Driver Assist and/or Take Steering Messages on Start-up, Advanced Driver Assist Systems (ADAS) Features Not Available.
• 10181660Sep 2, 2020Transmission and drivetrain. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10179658Aug 27, 2020Engine. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10179642Aug 20, 2020Engine, Fuel system, Electrical system. This Preliminary information communicates A vehicle may have a concern of running poor and stalling. No trouble codes may be set referencing this condition. Fuel trims around -20% may be observed on both banks. Engine oil level will be found over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. Small gas engines (SGE) May only have the engine oil level over full and have a fuel…
• 10213749Aug 18, 2020Equipment, Body and structure. Service Update Bulletin. Certain vehicles may have a standoff flange on the front license plate mounting bracket that is too long and may interfere with the front fascia when being installed. The license plate bracket can be installed but bows away from the front fascia and in some cases, the front license plate bracket cannot be installed. Dealers are to install the front license plate bracket.
• 10179640Aug 18, 2020Equipment, Air bags. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting. Engineering is root causing the concern.
• 10180317Aug 14, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10180315Aug 12, 2020Electrical system. This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.
• 10180293Aug 10, 2020Transmission and drivetrain. 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.
• 10179630Aug 10, 2020Body and structure, Equipment. This Preliminary information communicates an issue with bug residue on the paint and how to properly remove it.
• 10179625Aug 6, 2020Equipment, Engine. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10179624Aug 5, 2020Air bags, Equipment, Electrical system. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting. Engineering is root causing the concern.
• 10179622Aug 3, 2020Visibility (wipers, defrost, mirrors), Equipment. This Preliminary information communicates an issue with a gurgle noise from the sunroof drains and advises customers to turn on the HVAC blower to clear the drain.
• 10178409Jul 30, 2020Engine cooling, Engine. Service Update - certain vehicles may have a condition where the engine oil cooler line is not fully seated into the quick connect at the radiator. Dealers are to inspect the engine oil cooler lines at the quick connector on the radiator to confirm they are fully seated.
• 10178396Jul 30, 2020Electrical system. This Preliminary information communicates an issues with front park assist false alerts caused by a software issues. Engineering has released updated software.
• 10178394Jul 29, 2020Electrical system. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10178391Jul 29, 2020Electrical system, Air bags. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting. Engineering is root causing the concern.
• 10178379Jul 23, 2020Equipment, Air bags. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting. Engineering is root causing the concern.
• 10178369Jul 10, 2020Electrical system. This Preliminary information communicates an issues with front park assist false alerts caused by a software issues. Engineering is working on new software to correct this concern.
• 10178368Jul 10, 2020Body and structure, Equipment. This Preliminary information communicates and issue with the front License Plate Bracket not fitting to the fascia correctly and advises dealership how to correct the fit issue.
• 10178287Jun 25, 2020Equipment. This informational bulletin provides information for dealers/technicians on the 2021 Chevrolet Suburban, Tahoe, GMC Yukon and Yukon XL New Model Features.
• 10178339Jun 22, 2020Transmission and drivetrain. This Preliminary information communicates to the dealer technician that the 10L80 transmission has been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission assembly.
• 10178325Jun 12, 2020Engine, Equipment. This Preliminary Information communication advises the technician that the Product Quality Center has a part restriction for the Engine Control Module. The dealer technician is advised to call the GM Product Quality Center for further assistance
• 10178319Jun 10, 2020Engine, Electrical system. This Preliminary information communicates During inspection of the vehicle for an unrelated concern the technician may notice that one or more of the following Cylinder Deactivation Performance DTC(s) P3498, P3499, P349A, P349B, P349C, P349D, P349E, or P349F may be set in history. and not requesting MIL. If any of these DTCs are requesting the MIL, please follow appropriate service information for diagnosis & repair.
• 10175854Apr 30, 2020Equipment. This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before sold (prepping) to the customer.
• 10175762Apr 7, 2020Electrical system, Engine. This technical bulletin provides a procedure to check the oil level for correct reading and oil pressure switch is in working order.

← All problems reported for the 2021 GMC Yukon