2021 Chevrolet Tahoe Technical Service Bulletins

1,477 technical service bulletins (TSBs) are on record for the 2021 Chevrolet Tahoe. 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.

• 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
• 10179651Aug 25, 2020Body and structure. This Preliminary information communicates and issue with a rattle noise from the liftgate/liftglass and how to make adjustment to correct the noise.
• 10179650Aug 25, 2020Equipment, Body and structure. This Preliminary information communicates and issue with a rattle noise from the liftgate/liftglass and how to make adjustment to correct the noise.
• 10179642Aug 20, 2020Engine, Electrical system, Fuel 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…
• 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.
• 10179638Aug 17, 2020Body and structure, Wheels. This Preliminary information communicates that some customers may comment on a rattle, flutter, flapping, and/or wind type noise from the front end caused by either the left or right front inner wheel well liner having excessive movement.
• 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.
• 10179633Aug 11, 2020Transmission and drivetrain, Equipment, Electrical system. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues with modules Engineering is working on a fix
• 10179632Aug 11, 2020Transmission and drivetrain, Electrical system, Equipment. This Preliminary information communicates how to shift the transmission into neutral for various service procedures.
• 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.
• 10179628Aug 7, 2020Transmission and drivetrain, Electrical system. This Preliminary information communicates an issues with false codes setting in vehicles due to timing issues with modules Engineering is working on a fix
• 10179625Aug 6, 2020Engine, Equipment. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10179624Aug 5, 2020Equipment, Air bags, 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, Engine cooling. 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.
• 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, 2020Air bags, Equipment. This Preliminary information communicates an issue with the SIR MIL turning on and DTC B14DC setting. Engineering is root causing the concern.
• 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, 2020Engine, Electrical system. This technical bulletin provides a procedure to check the oil level for correct reading and oil pressure switch is in working order.

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