2020 GMC Sierra 2500 Technical Service Bulletins

1,392 technical service bulletins (TSBs) are on record for the 2020 GMC Sierra 2500. 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.

• 10208039Jan 18, 2022Back-over prevention (rear camera), Electrical system. This Preliminary Information communication provides information to the technician about vehicles that are found to have a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.
• 10208035Jan 18, 2022Engine cooling. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.
• 10208034Jan 18, 2022Other or unknown. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
• 10208030Jan 14, 2022Visibility (wipers, defrost, mirrors), Back-over prevention (rear camera). This Preliminary information communicates information on how to disable the Side Blind Zone Detection and Park Assist systems when a customer removes the pickup box from the vehicle to install an aftermarket bed or body.
• 10208029Jan 14, 2022Engine. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
• 10208027Jan 14, 2022Brakes, Fuel system. This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
• 10214200Jan 13, 2022Fuel system, Engine cooling, Equipment. This service bulletin provides service information for a DEF pump that is unable to build pressure after replacement.
• 10212612Jan 12, 2022Engine cooling. This bulletin provides additional information on how to graph a cylinder misfire and a possible diagnostic cause.
• 10214204Jan 11, 2022Equipment, Engine cooling. This informational bulletin explains how the regen works for the DEF system and how it works at different levels.
• 10212625Jan 11, 2022Engine cooling. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
• 10212606Jan 11, 2022Engine cooling. This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
• 10212601Jan 11, 2022Engine cooling. Informational bulletin explaining how a plow may cause overheating and engine damage when traveling over 45 mph.
• 10208017Jan 11, 2022Visibility (wipers, defrost, mirrors). This Preliminary information communicates to technicians to update the program in the DEF controller
• 10214207Jan 10, 2022Engine cooling, Electrical system. This technical bulletin provides a procedure to perform a learn procedure for the turbo actuator.
• 10214203Jan 10, 2022Back-over prevention (rear camera), Equipment, Brakes. This technical bulletin provides repair information to correct a customer concern of Rear View Camera Image Flickers When Brake Lamps or Turn Signals are On.
• 10213760Jan 10, 2022Brakes. This service bulletin provides information for tire pressure monitoring (TPM) system concerns.
• 10212616Jan 10, 2022Engine cooling. This informational bulletin explains how to identify possible DEF contamination.
• 10212611Jan 10, 2022Fuel 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.
• 10212594Jan 10, 2022Equipment. This service bulletin provides a diagnostic aid procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe.
• 10213758Jan 7, 2022Fuel system. This service bulletin provides information on availability of Diesel Fuel additives.
• 10212608Jan 7, 2022Engine cooling. This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
• 10212600Jan 6, 2022Electrical system. This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.
• 10212593Jan 6, 2022Fuel system. This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions.
• 10212589Jan 6, 2022Fuel system. This informational bulletin provides information on Diesel Exhaust Fluid (DEF) and the proper use of the DEF system.
• 10212588Jan 6, 2022Other or unknown, Engine cooling. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 10208013Jan 6, 2022Transmission and drivetrain, Equipment. This Preliminary information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 153. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
• 10208012Jan 6, 2022Back-over prevention (rear camera), Electrical system. This Preliminary information communication provides information to the technician on installing Regular Production Option Code UVC Rearview Camera. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 152. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
• 10208011Jan 6, 2022Electrical system. This Preliminary information communicates that the tool for the HD transfer cases to install the input seal during a repair is incorrect and a new tool is in development.
• 10213764Jan 5, 2022Equipment. 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.
• 10213767Jan 4, 2022Equipment. 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.
• 10213759Jan 4, 2022Fuel system. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
• 10213757Jan 4, 2022Tires. This service bulletin provides information for accurate tire pressures that ensure the safe handling and appropriate ride characteristics of GM cars and trucks.
• 10212564Dec 16, 2021Air bags. This technical bulletin provides a procedure to replace the air bag and air bag harness to correct a condition of Airbag Malfunction Warning and Airbag Malfunction Indicator Illuminated with DTC B0001-1B due to corrosion.
• 10207914Dec 16, 2021Engine cooling, Other or unknown. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes.
• 10206733Dec 16, 2021Equipment, Engine cooling. This Preliminary information communicates to the dealer an issue where a vehicle may be exhibiting an engine noise condiion. The dealer is instructed on how to isolate the noise to a specific area of the engine for further diagnosis.
• 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
• 10212562Dec 6, 2021Back-over prevention (rear camera), Brakes, Engine cooling. This technical bulletin provides a procedure to inspect and repair the fuel pressure sensor if found the cause of the customers concern.
• 10206717Dec 6, 2021Engine cooling. This Preliminary information communicates to dealer technicians normal operating characteristics of the turbocharger exhaust brake.
• 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.
• 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.
• 10205584Nov 18, 2021Electrical system, Engine cooling, Equipment. This technical bulletin provides a procedure to re-route the coolant hose away from the front prop shaft to avoid contact.
• 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.
• 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.
• 10205564Nov 9, 2021Equipment, Transmission and drivetrain. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak.
• 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.
• 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.
• 10205569Nov 4, 2021Equipment, Electrical system. This technical bulletin provides a procedure This technical bulletin provides repair information to correct a customer concern of Unable to Set PIN to Enable Teen Driver Feature.
• 10205545Nov 3, 2021Back-over prevention (rear camera), Equipment, Electrical system. This technical bulletin provides repair information to correct a customer concern of Rear View Camera Image Flickers When Brake Lamps or Turn Signals are On.
• 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.

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