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.

• 10186061Dec 11, 2020Engine cooling, Equipment. This technical bulletin provides a procedure to measure vibration and install engine mounts to correct a Rough Idle in Drive concern.
• 10187411Dec 10, 2020Electrical system. This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU.
• 10187176Dec 10, 2020Equipment. This preliminary information communicates to technicians a possible valve cover causing oil consusmption and the repair.
• 10186084Dec 10, 2020Equipment, Electrical system. This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU.
• 10185725Dec 10, 2020Engine cooling. This preliminary information communicates to technicians a possible valve cover causing oil consusmption and the repair.
• 10187627Dec 8, 2020Engine cooling, Equipment. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 10186106Dec 8, 2020Equipment, Engine cooling. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 10187410Dec 4, 2020Equipment. This technical bulletin provides repair information to correct a customer concern of seeing the trailer running lights shut off due to excessive load on the running lamp circuit.
• 10187394Dec 4, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10186083Dec 4, 2020Equipment, Electrical system. This technical bulletin provides repair information to correct a customer concern of seeing the trailer running lights shut off due to excessive load on the running lamp circuit.
• 10186080Dec 4, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10187626Dec 1, 2020Equipment. This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only).
• 10187383Dec 1, 2020Engine cooling. This service bulletin provides a diagnostic procedure to aid in correcting a customer concern of a Howling, Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.
• 10187372Dec 1, 2020Transmission and drivetrain. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10186105Dec 1, 2020Equipment. This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only).
• 10186069Dec 1, 2020Transmission and drivetrain, Brakes, Equipment. This service bulletin provides a diagnostic procedure to aid in correcting a customer concern of a Howling, Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.
• 10186058Dec 1, 2020Transmission and drivetrain, Electrical system. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10186046Dec 1, 2020Equipment, Engine cooling. Customer Satisfaction Program. Certain vehicles, equipped with a gas engine, may have a condition in which the printed circuit board inside of the water pump may have been manufactured incorrectly potentially causing a water pump failure. The vehicle coolant system temperature is monitored and will display multiple warnings to the customer as coolant temperatures rise.
• 10184482Nov 30, 2020Transmission and drivetrain, Equipment, Visibility (wipers, defrost, mirrors). This technical 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.
• 10184521Nov 25, 2020Engine cooling, Electrical system. 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 being illuminated.
• 10184480Nov 25, 2020Equipment. This warranty administration bulletin provide policy information for variable diagnostic time allowances on select labor operations (U.S. Only).
• 10184484Nov 23, 2020Transmission and drivetrain, Equipment. This technical bulletin provides a procedure to replace the 4 5 6 clutch housing if the bushing was found worn and the cause of the customers concern.
• 10184527Nov 20, 2020Electrical system, Engine. Service Update. Certain vehicles may present a broken engine valve spring. This may cause the engine to run rough, an engine knocking or ticking noise, a check engine light illumination, or a possible vehicle stall. Dealers are to perform the inspection procedure contained within this bulletin.
• 10184135Nov 20, 2020Equipment, Electrical system, Engine. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
• 10184133Nov 20, 2020Equipment, Engine cooling. This Preliminary information communicates to the technition instructions to replace the particulate matter sensor for a P1488 and to use the special labor operation for tracking purposes.
• 10184132Nov 20, 2020Equipment. This Preliminary information communicates to the technician a possible cause of a P2B60 as terminal corrosiosn and provides a correction
• 10184501Nov 19, 2020Engine, Transmission and drivetrain. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.
• 10184489Nov 19, 2020Transmission and drivetrain, Equipment. This Technical bulletin provides a repair to correct a condition of Shudder/Surging While Driving.
• 10184127Nov 19, 2020Electrical system, Back-over prevention (rear camera). This Preliminary information communicates a cocnern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.
• 10184508Nov 18, 2020Equipment, Visibility (wipers, defrost, mirrors). This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a noise coming from the window regulator area.
• 10184120Nov 17, 2020Engine. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10184499Nov 12, 2020Equipment, Wheels. This service bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted Appearance of Chromed Aluminum Wheels.
• 10184105Nov 11, 2020Wheels, Tires. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
• 10184493Nov 9, 2020Equipment, Electrical system. This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU.
• 10184507Nov 6, 2020Equipment, Engine. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards a start/stop event or during a normal start using the push button on the dash the vehicle would not crank causing it to not start.
• 10184504Nov 6, 2020Visibility (wipers, defrost, mirrors). This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic.
• 10184503Nov 6, 2020Body and structure, Equipment. Thins informational bulletin provides information on Paint-less Dent Repair Process.
• 10184099Nov 5, 2020Electrical system, Equipment. This Preliminary information communicates a condition where the trailering app cannot be opened and provides a process for clearing the cache and personal data so the application will operate as designed.
• 10184095Nov 5, 2020Engine. This Preliminary information communicates 6.2L engine restriction, Contact TAC
• 10184502Nov 2, 2020Equipment, Engine cooling. This informational bulletin provides information on Clean Exhaust Filter See Owners Manual Now or Cleaning Exhaust Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.
• 10183211Oct 30, 2020Equipment, Engine cooling. This service bulletin provides information on Improved Oil Filter Gasket Design for Spin-On Oil Filters PF63, PF64 and PF48.
• 10183171Oct 28, 2020Transmission and drivetrain, Engine, Equipment. This bulletin provides additional information on how to graph a cylinder misfire and a possible diagnostic cause.
• 10183132Oct 28, 2020Equipment, Engine cooling. This informational bulletin provides a procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe.
• 10182578Oct 28, 2020Engine cooling. This Preliminary information communicates an issue with the engine wiring harness shorting on the ecm mounting bracket and provides repair instructions.
• 10182576Oct 28, 2020Engine cooling. This Preliminary information communicates the possibility of the having dtc p06DD P06DA P06DB due to engine wiring harness concerns.
• 10183783Oct 27, 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.
• 10183198Oct 27, 2020Electrical system. This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes.
• 10183193Oct 27, 2020Equipment, Body and structure. This technical bulletin provides repair information to correct a customer concern of vertical misalignment between cab and pickup box on driver side of vehicle.
• 10183176Oct 27, 2020Fuel system, Equipment. This informational bulletin explains how to identify possible DEF contamination.
• 10183782Oct 23, 2020Transmission and drivetrain, Electrical system, Equipment. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.

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