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.

• 10206726Dec 14, 2021Engine cooling. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
• 10212563Dec 9, 2021Engine cooling, Fuel system, Other or unknown. This technical bulletin provides a procedure to replace the fuel filter and perform a filter life procedure if found the reason for a failed fuel filter life reset during ECM transfer of data.
• 10212560Dec 9, 2021Engine cooling. This informational bulletin advises the technician of possible coolant entering the areas of the engine, either through failed parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.
• 10207919Dec 9, 2021Exterior lighting, Equipment. This informational bulletin provides information for Police Tahoes that were Ordered Without Flashing Headlamps and Taillamps.
• 10206721Dec 9, 2021Back-over prevention (rear camera), Electrical system. This Preliminary information communicates an issue with the GDS2 scan tool not being able to communication with the front view camera module and provides a work around until GDS2 is fixed.
• 10206720Dec 8, 2021Suspension, Electronic stability control. This Preliminary information communicates an issue with how to properly inspect and ensure the air lines for the air suspension system are fully seated.
• 10206716Dec 6, 2021Electrical system. This Preliminary Information communication provides information to the technician about customers that may request the factory Integrated Trailer Brake Controller Regular Production Option Code (JL1) be installed on their Full-Size Pickup or SUV when the vehicle was not ordered with the option. Dealer should advise the customer it cannot be added to the vehicle.
• 10205597Nov 30, 2021Transmission and drivetrain. This service bulletin provides diagnostic information for technicians in cases of an ETRS system fault or a no start condition - If the vehicle needs to be moved, it is recommended to use wheel dollies, tire skates or the NEW Manual Park Release tool DT-52910.
• 10204460Nov 29, 2021Equipment, Electrical system. This Preliminary information communicates an issues with an SES MIL, A/C blowing warm air and DTC's B1AA3 U3018 U3505 due to Fuse F4DR open. Dealers are to inspect the wiring in the front floor console.
• 10204458Nov 29, 2021Equipment, Visibility (wipers, defrost, mirrors). This Preliminary information communicates an issues will low or poor heater performance on the drivers side. Dealers are to inspect the HVAC temperature door linkage and if ok replace the heater core.
• 10204456Nov 22, 2021Body and structure, Electrical system, Equipment. This Preliminary information communicates an issue with: Overhead Console Inoperative / Service Safety Restraints Message / Sunroof Inoperative / DTC's B1A7A and U1121. Dealers are to cycle the power to the overhead console to correct the issue. Engineering has released updated roof consoles to correct this concern. Dealers are to replace the roof console.
• 10204455Nov 22, 2021Electrical system, Engine cooling, Fuel system. This Preliminary information communicates to technicians a P205B intermittently setting is under investigation by engineering and to clear the code and release the vehicle.
• 10205591Nov 19, 2021Engine, Equipment, Engine cooling. This service bulletin provides information on Engine Oil Consumption Guidelines.
• 10205590Nov 19, 2021Engine cooling, Equipment, Electrical system. TGhis bulletin advises the technician of a possible coolant hose that might be kinked causing the customers concern.
• 10205586Nov 19, 2021Engine, Equipment, Engine cooling. This bulletin advises the technician of a possible location that a leak may occur from the SCT pipe.
• 10205582Nov 18, 2021Exterior lighting, Electrical system. This service bulletin provides information for Police Tahoes that were Ordered Without Flashing Headlamps and Taillamps.
• 10205563Nov 18, 2021Engine cooling, Equipment. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes.
• 10205746Nov 17, 2021Engine cooling. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Reductant Tank Temperature Sensor Performance and/or Service Emissions System Message on Driver Information Center (DIC), DTC P205B Set.
• 10205548Nov 17, 2021Equipment, Back-over prevention (rear camera). This service bulletin provides information for customers/dealers/technicians on Normal Rearview Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Rear View Camera Display.
• 10205544Nov 16, 2021Steering, Equipment, Electrical system. This service 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 with DTCs U1614, U1615, U1616 Set.
• 10205557Nov 15, 2021Equipment, Electrical system. This technical bulletin provides repair information to correct a customer concern of Power to the 110V/120 Outlet is Interrupted During an Auto Stop/Start Event.
• 10204450Nov 12, 2021Air bags, Electrical system. This Preliminary information communicates a diagnostic tip on how to resolve a issue with DTC: U300 SYM 49
• 10205738Nov 8, 2021Wheels, Tires. This service bulletin provides information for dealers/technicians on Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires.
• 10205552Nov 8, 2021Electrical system, Engine cooling. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
• 10205539Nov 8, 2021Engine cooling, Equipment. This service bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
• 10205737Nov 5, 2021Equipment. This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure, when diagnosing vibration concerns.
• 10205567Nov 4, 2021Engine, Equipment, Electrical system. This service bulletin provides a repair procedure to correct a customer concern of a No Fob detected message on Driver Information Center (DIC) and/or No Crank / No Start condition.
• 10204441Nov 3, 2021Forward collision avoidance, Lane departure. This Preliminary information communicates an issue with adaptive cruise and lane keep assist inoperative due to an internal issue with the front view windshield camera. Dealers are to replace the camera.
• 10205566Nov 2, 2021Electrical system, Equipment. This technical bulletin provides repair information to correct a customer concern of Short Range Radar (SRR) with DTC U3000 49 Set.
• 10204437Nov 2, 2021Engine. This Preliminary Information communication advises the technician with a tip when the vehicle stops running after it has been idling for 2.5 hours. This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.
• 10202408Sep 28, 2021Engine cooling. This Preliminary information communicates that the E66 ECM is on a parts restriction
• 10202403Sep 22, 2021Transmission and drivetrain. This Preliminary information communicates to technicians to advise dealership technicians to inspect the camshaft exciter wheel and replace it if necessary.
• 10202402Sep 22, 2021Engine cooling. This Preliminary information communicates to technicians the need to reprogram the ECM for an intermittent crank/no start concern.
• 10202399Sep 21, 2021Equipment. This Preliminary information communicates information on vehicle speed being limited due to aftermarket lower kit being installed on the vehicle.
• 10202389Sep 8, 2021Engine cooling. This Preliminary information communicates information on a No Crank / No Start concern caused by a No Fob Detected message caused by an internal fault of the BCM. Dealer is to replace the BCM to correct this concern.
• 10202388Sep 7, 2021Electrical system. This Preliminary information communicates an issues with the odometer being incorrect after a programming event and how the dealership can resolve the issue.
• 10201330Aug 26, 2021Electrical system. This Preliminary information communicates an issue with: Overhead Console Inoperative / Service Safety Restraints Message / Sunroof Inoperative / DTC's B1A7A and U1121. Dealers are to cycle the power to the overhead console to correct the issue. Engineering has released updated roof consoles to correct this concern. Dealers are to replace the roof console.
• 10205057Aug 20, 2021Fuel system. This service bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
• 10201316Aug 18, 2021Equipment, Electrical system. This Preliminary information communicates a possible SIM issue with vehicles in the middle east.
• 10201315Aug 18, 2021Engine. This Preliminary information communicates diagnostics to the dealer involving a vehicle shudder concern caused by the camshaft actuator system that can be mistaken for a transmission issue.
• 10201314Aug 16, 2021Equipment, Electrical system. This Preliminary information communicates an issue with: Overhead Console Inoperative / Service Safety Restraints Message / Sunroof Inoperative / DTC's B1A7A and U1121. Dealers are to cycle the power to the overhead console to correct the issue. Engineering has released updated roof consoles to correct this concern. Dealers are to replace the roof console.
• 10201311Aug 16, 2021Engine, Electrical system. This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
• 10201310Aug 11, 2021Equipment. This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts/kits. Technicians should refer to Service Information for information regarding most accessories. Technicians may also contact PARTECH and/or the Techline Customer Support Center for additional support.
• 10201308Aug 9, 2021Electrical system. This Preliminary information communicates and issue with unwanted content theft alarm going off for no reason and to reprogram the BCM to correct the issue.
• 10205059Aug 6, 2021Electrical system. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
• 10205058Aug 6, 2021Engine. This informational bulletin provides information for dealers/technicians on the false setting of DTC U0212.
• 10205048Aug 6, 2021Engine. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
• 10201306Aug 6, 2021Engine. This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
• 10201259Jul 26, 2021Air bags, Equipment, Transmission and drivetrain. This Preliminary information communicates an issue with: Overhead Console Inoperative / Service Safety Restraints Message / Sunroof Inoperative / DTC's B1A7A and U1121. Dealers are to cycle the power to the overhead console to correct the issue. Engineering has released updated roof consoles to correct this concern. Dealers are to replace the roof console.
• 10201257Jul 26, 2021Body and structure, Electrical system. This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.

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