2020 GMC Sierra 3500 Technical Service Bulletins

906 technical service bulletins (TSBs) are on record for the 2020 GMC Sierra 3500. 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.

• 10181144Sep 17, 2020Electrical system. This Preliminary information communicates an issue with the underhood electrical center bolts being loose which can cause any of the following symptoms: - No crank - No start - Starter grinds or reengages after engine running - Headlights flicker or flash - SES MIL - IPC gauges sweep/fluctuate and various IPC warning lights or messages - High or low system voltage Some of these concerns may be notices with…
• 10181141Sep 15, 2020Engine cooling. This PI was created to gather data to root cause the P06DD and/or oil consumption
• 10181731Sep 9, 2020Transmission and drivetrain. This engineering information (EI) is requesting information from technicians to provided the engineers listed in regards to Early, Late, Harsh and/or Slip Type Transmission Performance.
• 10179658Aug 27, 2020Engine. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10180306Aug 6, 2020Brakes. This technical bulleti provides a procedure to replace the front and rear brake pads if the brakes are squealing.
• 10179625Aug 6, 2020Engine, Equipment. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10178964Jul 29, 2020Steering. This technical bulletin provides repair information to correct a customer concern of Intermittent "Service Steering Column Lock" message displayed with U0155 Set.
• 10178951Jul 23, 2020Engine cooling. This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.
• 10178959Jul 22, 2020Equipment, Body and structure. This preliminary informational bulletin provides frame coating repair information to correct a customer concern of wax coating on frame peeling, metal shows corrosion/rusting (U.S. and Canada Only).
• 10179535Jul 13, 2020Body and structure, Suspension. This engineering information (EI) is requesting information from technicians to perform the inspection and verify that the rear axle dampener (TVA) is loose after a loud banging noise is heard from the rear of the vehicle while in motion and contact the engineer listed.
• 10178370Jul 13, 2020Engine, Engine cooling, Equipment. This Preliminary information communicates the use of air leak diagnostic test tool CH-52250 in addition to the information found in the service manual.
• 10178367Jul 10, 2020Engine, Transmission and drivetrain. This Preliminary Information communication provides information and definitions to the technician about vehicles that have fishbite, chuggle, misfire, AFM disturbances or torque converter shudder/vibration concerns. Technician are advised to use PICO software to determine root cause of the concern. If torque converter shudder is confirmed technicians are referred to Torque Converter Diagnosis in SI.
• 10178963Jul 9, 2020Brakes. This technical bulleti provides a procedure to replace the front and rear brake pads if the brakes are squealing.
• 10178356Jun 26, 2020Electrical system. This Preliminary information communicates an issue with the Electronic Brake Control Module incorrectly mapping DTC U0126 as a U0131 and directs the dealership to follow the diagnostics for the U0126.
• 10178269Jun 17, 2020Equipment, Body and structure, Electrical system. This technical bulletin provides repair information to correct a customer concern of 360 Camera Views go Blank with Tailgate Removed.
• 10177365Jun 15, 2020Equipment, Body and structure. Service Update (Revised Population). The purpose of this service update is to provide the customer with a goodwill gift to offset customer inconvenience, restore confidence in GM, and maintain loyalty to GM. The vehicles involved in this service update have previously had a hood assembly replacement under recall N192284960. These customers are now being asked to bring their vehicle back in for another hood…
• 10178320Jun 11, 2020Engine. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10177357Jun 9, 2020Equipment, Body and structure. Service Update. The purpose of this service update is to provide the customer with a goodwill gift to offset customer inconvenience, restore confidence in GM, and maintain loyalty to GM. The vehicles involved in this service update have previously had a hood assembly replacement under recall N192284960. These customers are now being asked to bring their vehicle back in for another hood replacement under Safety…
• 10176821May 21, 2020Engine cooling, Fuel system. Service Update - In some vehicles, equipped with diesel engines, the Diesel Exhaust Fluid (DEF) system may not immediately reactivate, as it should, after the vehicle?s control system finds that a DEF heater fault is no longer present. In these vehicles, after such a fault is detected as absent, DEF system reactivation, including DEF injection, may not occur until the ignition key is cycled. Dealers are to…
• 10176621May 21, 2020Brakes. This technical bulletin provides a procedure to replace the front and rear brake pads if the brakes are squealing.
• 10176818May 19, 2020Back-over prevention (rear camera). Customer Service Program - Certain vehicles may not have the backup alarm which should have been included the dealer kit. Dealers are to provide the missing backup alarm to the customer.
• 10176622May 18, 2020Body and structure, Back-over prevention (rear camera). This informational bulletin provides information for dealers/technicians on Rear Camera Gridlines Incorrect, Misaligned, Offset, Incorrect Camera View after Replacing the Tailgate Handle or Entire Tailgate.
• 10207732May 15, 2020Transmission and drivetrain. Service Update. Certain vehicles may have a condition where the transmission enters a neutral state when the internal range sensor (IRS) fault is active. Dealers are to reprogram the transmission control module.
• 10176307May 8, 2020Transmission and drivetrain. This Preliminary information communicates diagnostic tips on finding root cause of a hoot noise. If the technician confirms the hoot noise is only present while the torque converter clutch is applying the technician should advise the customer that the noise will diminish over mileage and should dissipate after 3,000 ? 4,000 miles of driving and does not pose a durability concern.
• 10176631May 5, 2020Electrical system, Engine. This informational bulletin provides information for dealers/technicians on Glow Plug Control Module Update.
• 10176624May 4, 2020Engine cooling. 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.
• 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.
• 10174869Apr 30, 2020Electrical system. This Preliminary information communicates diagnostic tips when trying to root cause a SES MIL with DTC's B2B0D and B2B0E. Main cause is aftermarket electrical devices spliced into the ignition main fuses.
• 10175850Apr 29, 2020Tires, Equipment. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10174860Apr 27, 2020Engine cooling. This Preliminary information communicates the possibility of dtc P12A6 with the possibility of a crank no start or extended crank concern.
• 10174859Apr 27, 2020Electrical system. This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.
• 10175858Apr 20, 2020Equipment, Transmission 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 a Service 4WD message being visible on the driver information center (DIC).
• 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.
• 10174276Mar 24, 2020Electrical system, Equipment. This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update.
• 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.
• 10174278Mar 17, 2020Transmission and drivetrain. This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition.
• 10174300Mar 4, 2020Tires. This informational bulletin provides information for dealers/technicians on Use of Nitrogen Gas in Tires.
• 10174280Mar 4, 2020Body and structure. This technical bulletin provides repair information to correct a customer concern of hearing a wind whistle noise from front of vehicle while driving.
• 10179892Mar 3, 2020Electrical system. Hypertech Inline Speedometer Calibrator Module Installation Instructions
• 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.
• 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.
• 10173408Feb 25, 2020Transmission and drivetrain. This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition.
• 10173404Feb 24, 2020Equipment, Steering. This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
• 10172326Feb 19, 2020Engine, Equipment. This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program and crankshaft has been placed on part ordering restriction. Dealer will need to contact General Motors Product Quality Center for further assistance.
• 10173388Feb 17, 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.
• 10172773Feb 14, 2020Equipment. This warranty administration bulletin provide policy information to cover GMs policy on performing GM covered vehicle services and maintenance on vehicles originating/sold in Canada.
• 10172664Feb 14, 2020Electrical system, Fuel system, Engine cooling, Equipment. Service Update - On vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1. The instrument panel cluster may incorrectly display the message ?DEF Low? when a diesel exhaust fluid (DEF) controller internal fault is detected (DTC P20FF), instead of displaying the proper ?Service DEF System? message. 2. The customer may complain of excessive engine fan noise at…

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