2020 GMC Sierra 1500 Technical Service Bulletins

1,539 technical service bulletins (TSBs) are on record for the 2020 GMC Sierra 1500. 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.

• 10199281May 25, 2021Fuel system. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
• 10199280May 25, 2021Electrical system. This technical bulletin provides a procedure to inspect fuses F51DR and/or F52DR in the X51R right instrument panel fuse block when they should not be installed.
• 10199239May 25, 2021Electrical system, Equipment. This service bulletin provides repair information to correct a customer concern of Blue or Black Screen and Service Rear Vision System Message on Radio Display Shifting into Reverse.
• 10198890May 25, 2021Electrical system. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
• 10198889May 25, 2021Electrical system. This technical bulletin provides a procedure to inspect fuses F51DR and/or F52DR in the X51R right instrument panel fuse block when they should not be installed.
• 10198848May 25, 2021Back-over prevention (rear camera). This service bulletin provides repair information to correct a customer concern of Blue or Black Screen and Service Rear Vision System Message on Radio Display Shifting into Reverse.
• 10197309May 25, 2021Brakes. This Preliminary information communicates the location of the GM Accessory Performance Brake System Rotor Specifications
• 10199235May 21, 2021Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 10198844May 21, 2021Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 10200090May 17, 2021Equipment. This service bulletin provides information for dealers on how to submit a product information report (PIR) (Canada Only).
• 10200088May 17, 2021Equipment. This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
• 10197298May 17, 2021Engine. This Preliminary information communicates that a vehicle may exhibit a misfire condition resulting in misfire codes P0300-P308. Upon diagnosis it may be discovered the lifter has come apart. It is recommended to replace the lifter guide and the four lifters.
• 10200098May 12, 2021Electrical system. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Loss of Power, Instrument Panel Cluster (IPC) Gauges are Inoperative and/or Fluctuate, Multiple Warning Lights on DIC.
• 10199234May 12, 2021Electrical system, Latches, locks and linkages. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
• 10198843May 12, 2021Latches, locks and linkages. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
• 10199269May 10, 2021Body and structure. This service bulletin provides a procedure to replace both front door seals to correct a customer concern of Howl, Hoot, or Whistle Type Noise when Driving in Crosswinds.
• 10198878May 10, 2021Body and structure. This service bulletin provides a procedure to replace both front door seals to correct a customer concern of Howl, Hoot, or Whistle Type Noise when Driving in Crosswinds.
• 10197289May 10, 2021Visibility (wipers, defrost, mirrors). This Preliminary information communicates an issue with poor a/c performance and to replace the a/c condenser.
• 10200091May 7, 2021Equipment. This informational bulletin provides technicians and dealership personnel with spray-in bed liner general information and repair procedures.
• 10199253May 7, 2021Electrical system. This service bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
• 10198862May 7, 2021Engine cooling. This service bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
• 10199272May 6, 2021Equipment. This informational bulletin provides information for dealers/technicians on Information on GM Accessories - Instructions on Claim Submission on Dealer-Replaced Tonneau Covers During Warranty Period.
• 10199249May 6, 2021Equipment. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10199237May 6, 2021Electrical system, Fuel system. This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
• 10198881May 6, 2021Equipment. This informational bulletin provides information for dealers/technicians on Information on GM Accessories - Instructions on Claim Submission on Dealer-Replaced Tonneau Covers During Warranty Period.
• 10198858May 6, 2021Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10198846May 6, 2021Fuel system. This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
• 10200097May 5, 2021Electrical 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 illuminated on Driver Information Center.
• 10199240May 5, 2021Suspension. This technical bulletin provides repair information to correct a customer concern of a squeak and/or clunking noise coming from the rear of the vehicle.
• 10198849May 5, 2021Back-over prevention (rear camera). This technical bulletin provides repair information to correct a customer concern of a squeak and/or clunking noise coming from the rear of the vehicle.
• 10199271May 3, 2021Engine. This service bulletin provides diagnostic information for a customer concern of engine vibration.
• 10199265May 3, 2021Back-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.
• 10199238May 3, 2021Engine, Electrical system. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
• 10198880May 3, 2021Engine cooling. This service bulletin provides diagnostic information for a customer concern of engine vibration.
• 10198874May 3, 2021Back-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.
• 10198847May 3, 2021Engine cooling. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
• 10194079Apr 30, 2021Transmission and drivetrain. This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
• 10195152Apr 26, 2021Transmission and drivetrain, Brakes. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a tick and/or ping type noise heard from the Propeller Shaft during acceleration and/or braking.
• 10195150Apr 23, 2021Electrical system. This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.
• 10194114Apr 23, 2021Equipment. This service bulletin provides information regarding Witness Marks from Panel Adjustments Made During Manufacturing and that it is considered a normal condition.
• 10194090Apr 23, 2021Transmission and drivetrain. This service bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
• 10193473Apr 23, 2021Engine. This Preliminary information communicates that a vehicle may exhibit a misfire condition resulting in misfire codes P0300-P308. Upon diagnosis it may be discovered the lifter has come apart. It is recommended to replace the lifter guide and the four lifters.
• 10195126Apr 22, 2021Engine. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
• 10194107Apr 22, 2021Brakes. This technical bulletin provides a procedure to replace the rear calipers if found packed for of mud and debris.
• 10193467Apr 22, 2021Equipment, Engine. This Preliminary information communicates to the dealer technicians that a belt chirp or rubbing noise may be caused by the harmonic balancer out ring moving backward on the pulley and contacting the front cover.
• 10193466Apr 22, 2021Electrical system. This Preliminary information communicates and issue with the park assist off message or unwanted/false parking assist alerts and provide diagnostics tip for dealership to inspect the parking assist sensor/bezel mounting in the front and rear bumpers
• 10193465Apr 21, 2021Engine, Electrical system. This Preliminary information communicates the following issues and directs dealership to inspect the engine harness for shorting.
• 10194125Apr 20, 2021Equipment. Customer Satisfaction - Certain 2020 model year Chevrolet Silverado 1500 and Sierra 1500 vehicles are equipped with trailering information labels that incorrectly state the vehicle?s trailering capabilities. Install the overlay labels. Because these labels can easily be installed by the customer, and to reduce their inconvenience, labels and installation instructions will be mailed to customers of record.
• 10195156Apr 16, 2021Exterior lighting, Electrical system. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Malfunction Indicator Lamp illuminated on Driver Information Center (DIC) with DTCs P3055, P3056 Set.
• 10194101Apr 16, 2021Equipment. This warranty administration bulletin provides policy information requirements applicable to key fob replacement under the New Vehicle Limited Warranty or under a Replacement Parts Warranty on 2017-2022 and newer model year vehicles with RPO ATH and AVJ (U.S. Only).

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