2021 GMC SIERRA 2500 Manufacturer communications & TSBs.Page 9
Original record summaries, dates and identifiers for this model-year. Records 801–900 of 1,060, ordered newest first. Dated records on this page: May 12, 2021–Jan 18, 2022.
Read the applicability before drawing a conclusion.
This archive includes service bulletins, warranty notices, software instructions and other communications. Records may repeat or supersede earlier instructions. A model-year association is not proof that a document covers every engine, trim, VIN or reported symptom, or that a repair is free.
NHTSA download snapshot: Sep 28, 2026. These are communication associations for this vehicle, not unique defects. How records are joined and counted.
Jan 18, 2022Service Bulletin/Repair Instructions
PIT5386G
NHTSA communication ID: 10208039
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: BACK OVER PREVENTION · ELECTRICAL SYSTEM.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: BACK OVER PREVENTION · VISIBILITY.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This technical bulletin provides a procedure to perform a learn procedure for the turbo actuator.
Source components: ELECTRICAL SYSTEM · ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE · ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
Source components: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN · UNKNOWN OR OTHER.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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."
Source components: EQUIPMENT · POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:FILTER/SCREEN.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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."
Source components: BACK OVER PREVENTION: CAMERA SYSTEM · ELECTRICAL SYSTEM.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This service bulletin provides information for accurate tire pressures that ensure the safe handling and appropriate ride characteristics of GM cars and trucks.
Source components: TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: ENGINE AND ENGINE COOLING · EQUIPMENT.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Articulated Running Board (ARB).
Source components: ELECTRICAL SYSTEM · EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: BACK OVER PREVENTION · EQUIPMENT.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This service bulletin provides information for dealers/technicians on Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates A customer vehicle may have a concern of a P0300 setting after bulletin 21-NA-154 has been performed. Unknown Engineering is looking it to this concern
NHTSA source summary · Original PDF not reviewed by Recallfolio
This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates multiple vehicle issues caused by an aftermarket device and it gives dealership information where to inspect for this device.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates information on a hydrauilc rush type noise from the power steering gear. This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made. The noise is most noticeable in the cab at idle, in park, with all accessories turned off.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates diagnostics to the dealer involving a vehicle shudder concern caused by the camshaft actuator system that can be mistaken for a transmission issue.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts/kits. Technicians should refer to Service Information for information regarding most accessories. Technicians may also contact PARTECH and/or the Techline Customer Support Center for additional support.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to their vehicle having sudden loss of propulsion.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the trailer light message and/or trailer disconnect message on the infotainment screen.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: POWER TRAIN:MANUAL TRANSMISSION:SEALS/GASKETS.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to their vehicle having sudden loss of propulsion.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to why is Engineering seeking more details on what is driving Engine Oil Cooler replacements through the warranty system.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a turn signal not canceling and/or mis-canceling.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
Source components: COMMUNICATION: VEHICLE TO INFRASTRUCTURE.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates to the dealer technician that if a customer comments that their vehicle equipped with a 6L80, 6L90, 8L90, 10L80, or 10L1000 transmission has a harsh shift, shudder, stall or high transmission fluid temperature concern they should inspect for a twisted transmission cooler line. Technicians are instructed to disconnect the cooler line and untwist it then reconnect the cooler line and inspect the cooler line for being misshaped. Technicians are instructed to replace the cooler line if it is misshaped.
Source components: FUEL SYSTEM, GASOLINE · POWER TRAIN.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Service Engine Soon (SES) lamp illuminated and/or Service Emission System Message on the Driver Information Center (DIC).
Source components: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL · ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL · EQUIPMENT.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
Source components: EQUIPMENT · EQUIPMENT ADAPTIVE/MOBILITY · POWER TRAIN:DRIVELINE.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This service bulletin provides a procedure to correct a condition of a Service Emission System and/or Service Engine Soon Lamp Illuminated on Driver Information Center (DIC), DTC P208B Set.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Service Engine Soon (SES) lamp illuminated and/or Service Emission System Message on the Driver Information Center (DIC).
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
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.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates to the dealer technician that it is a normal characteristic for vehicles equipped with the 10L1000 transmission to start off in second gear in normal driving mode. It also communicates that the vehicle will start off in first gear if tow haul is selected.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This Preliminary information communicates to the dealer technician that if a customer comments that their vehicle equipped with a 6L80, 6L90, 8L90, 10L80, or 10L1000 transmission has a harsh shift, shudder or stall concern they should inspect for a twisted transmission cooler line. Technicians are instructed to disconnect the cooler line and untwist it then reconnect the cooler line and inspect the cooler line for being misshaped. Technicians are instructed to replace the cooler line if it is misshaped.
Source components: FUEL SYSTEM, GASOLINE · POWER TRAIN.
NHTSA source summary · Original PDF not reviewed by Recallfolio
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to one or more of the following condition Stalls, Crank with no star, Check Engine Lamp illuminated on the Driver Information Center (DIC).