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.

• 10174824Apr 16, 2020Brakes, Electrical system. This Preliminary information communicates an issue with a SES MIL and the Brake System Control Module setting false DTC's during shut down. GM Engineering released updated cals for the BSCM to repair the issue.
• 10175749Apr 15, 2020Electrical system. This technical bulletin provides repair information to correct a customer concern of Blue Screen and Service Rear Vision System Message on Radio Display.
• 10175855Apr 14, 2020Equipment, Body and structure. This preliminary informational bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
• 10174818Apr 14, 2020Electronic stability control. This Preliminary Information communication provides information to the technician about vehicles that have an unwanted Stability Activation and/or a Service Stability message on the Driver Information Center. Technician may find a Diagnostic Trouble Code C0710. Technician should inspect for vehicles modifications before any in-depth diagnostics are performed.
• 10175766Apr 9, 2020Electrical system, Equipment. This technical bulletin provides repair information to correct a customer concern of Blank Radio Display or No Audio.
• 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.
• 10175761Apr 7, 2020Engine, Electrical system. This informational bulletin explains why more DEF is being used in diesel engines due to new emission standards.
• 10175747Apr 6, 2020Body and structure. This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
• 10175852Apr 3, 2020Equipment. This informational bulletin provides information on interior cleaning products and what is offered to clean the interiors of GM vehicles.
• 10175859Apr 2, 2020Equipment, Engine. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to oil leaking from the oil pan.
• 10174304Mar 31, 2020Equipment. This warranty administration bulletin explains to the technician that when using wiring repair labor operations, additional information may be needed when submitting Global Warranty transactions when doing wiring repairs.
• 10174295Mar 27, 2020Engine, Fuel system. This informational bulletin advises the technician on where to located the fuel injector identification number.
• 10174087Mar 27, 2020Electrical system. This technical bulletin provides a procedure to program the glow plug control module if found the cause of the customers concerns.
• 10173724Mar 27, 2020Equipment, Transmission and drivetrain. This Preliminary information communicates that engineering has developed a repair for a chirp noise associated with the front axle assembly.
• 10174439Mar 26, 2020Electrical system. This engineering information (EI) is requesting information from the field on conditions of Service Engine Soon (SES) Lamp Illuminated, DTCs B2B0D and/or B2B0E Central Gateway Module Codes Unable to Communicate with HSLAN or LSLAN. Eng is attempting to root cause condition and validate a field fix.
• 10174448Mar 25, 2020Other or unknown. This engineering information (EI) is requesting information from technicians to perform the checklist provided and contact the engineer listed in regards to a Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses Blown.
• 10174276Mar 24, 2020Electrical system, Equipment. This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update.
• 10173718Mar 24, 2020Electrical system, Engine. This Preliminary information communicates the following issues and directs dealership to inspect the engine harness for shorting.
• 10174302Mar 20, 2020Equipment. This informational bulletin provides information on interior cleaning products and what is offered to clean the interiors of GM vehicles.
• 10174303Mar 18, 2020Equipment. This warranty administration bulletin provides policy information for courtesy transportation and roadside assistance programs.
• 10174282Mar 18, 2020Latches, locks and linkages, Electrical system. This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all.
• 10174305Mar 17, 2020Engine cooling. This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.
• 10174278Mar 17, 2020Transmission and drivetrain. This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition.
• 10173703Mar 16, 2020Electrical system. This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
• 10174088Mar 13, 2020Electrical system. This informational bulletin provides information for dealers/technicians on Accessory Rear Seat Infotainment (RSI) Shuts Off, Coinciding with Closing of Door or Liftgate.
• 10174442Mar 6, 2020Transmission and drivetrain. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the transmission.
• 10174299Mar 6, 2020Equipment. This informational bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only).
• 10174081Mar 6, 2020Equipment. This technical bulletin provides repair information to correct a customer concern of the pickup box endgate will not fully close by itself.
• 10174438Mar 5, 2020Transmission and drivetrain. This engineering information (EI) ends the need for information from the field regarding 8 speed transmission shift quality.
• 10174300Mar 4, 2020Tires. This informational bulletin provides information for dealers/technicians on Use of Nitrogen Gas in Tires.
• 10173676Mar 4, 2020Electrical system, Brakes. This Preliminary information communicates an issue with a SES MIL and the Brake System Control Module setting false DTC's during shut down. GM Engineering is working on updated cals for the BSCM.
• 10173675Mar 4, 2020Engine. This preliminary information communicates the part restriction for the diesel turbocharger and EGR components. Updated to provide instruction on gathering additional data.
• 10173674Mar 4, 2020Transmission and drivetrain, Electrical system. This Preliminary information communicates to the dealer technician that the part numbers for the internal wiring harnesses for the 8 speed RWD transmissions are not listed in the Electronic Parts Catalog. Technicians are to refer to the information provided in this document to obtain the internal wiring harness part numbers by application.
• 10179892Mar 3, 2020Electrical system. Hypertech Inline Speedometer Calibrator Module Installation Instructions
• 10174301Mar 3, 2020Equipment. This warranty administration bulletin provides information on Warranty Administration ? Customer Concern Not Duplicated (CCND) Labor Operation Numbers.
• 10174073Mar 3, 2020Equipment. This technical bulletin provides a procedure to clear the codes and test the Tcase if found that the customer has tried to shift the t-case from 4lo to Hi gears while driving.
• 10174307Mar 2, 2020Equipment. This warranty administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
• 10173628Mar 2, 2020Equipment. The Preliminary Information communication advises the technician that the Product Quality Center has a part exchange for 3.0 LM2 engine. The dealer technician is advised to call the GM Product Quality Center for further assistance
• 10173416Feb 28, 2020Engine, Equipment. This informational bulletin explains Unscheduled Supplemental Services (including Flushing Services and Additives) and the Proper use of GM Simplified Maintenance Schedules.
• 10173393Feb 28, 2020Equipment, Body and structure. This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
• 10172815Feb 28, 2020Equipment. This technical bulletin provides repair information to correct a customer concern of endgate will not auto open or auto close after accessory tonneau cover installation, and/or poor fit of tonneau cover to endgate.
• 10172339Feb 28, 2020Visibility (wipers, defrost, mirrors), Engine. This Preliminary information communicates an issue with poor heater performance and advises dealerships to inspect the heater core inlet and outlet hoses for being twisted or kinked.
• 10173415Feb 27, 2020Equipment. This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only).
• 10173414Feb 26, 2020Tires, Equipment. This warranty administration bulletin provides information on the tires supplied with a new vehicle are covered by General Motors against defects in material or workmanship under the Bumper-to-Bumper New Vehicle Limited Warranty.
• 10172814Feb 26, 2020Engine, Equipment. This informational bulletin advises the technician to not replace the TMAP sensor, clean it using air or harsh chemicals but allow time for the sensor to thaw.
• 10172813Feb 26, 2020Latches, locks and linkages, Equipment. This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all.
• 10172811Feb 26, 2020Engine, Fuel system. This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence.
• 10172335Feb 26, 2020Fuel system, Engine. This preliminary information communicates the part restriction for the diesel turbocharger and EGR components. Updated to provide instruction on gathering additional data.
• 10172333Feb 26, 2020Electrical system. This Preliminary information communicates repair information on Service Brake System, Reduced Engine Power, and Speed Limited messages on the DIC. Along with these messages, a SES MIL will be on and the brake pedal may feel hard. When checking for DTC's the Brake System Control Module (BSCM) with have set a P0606 and C0021. Dealers are to reprogram the BSCM with updated calibrations to correct the concern.
• 10173408Feb 25, 2020Transmission and drivetrain. This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition.

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