2021 GMC Sierra 1500 Technical Service Bulletins

1,454 technical service bulletins (TSBs) are on record for the 2021 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.

• 10191206Mar 9, 2021Electrical system. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
• 10190396Mar 9, 2021Engine cooling. This Preliminary information communicates to the technician a service Diagnostic / Repair tip to avoid causing the crankshaft sprocket to disengage from the crankshaft during crankshaft balancer removal.
• 10191244Mar 8, 2021Transmission and drivetrain. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a tick and/or ping type noise heard from the Propeller Shaft during acceleration and/or braking.
• 10191212Mar 8, 2021Engine cooling. This informational bulletin provides a test procedure, for a possible faulty DEF Heater.
• 10191163Mar 8, 2021Steering. This service bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
• 10191240Mar 5, 2021Electrical system. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Loss of Power, Instrument Panel Cluster (IPC) Gauges are Inoperative and/or Fluctuate, Multiple Warning Lights on DIC.
• 10190365Mar 5, 2021Back-over prevention (rear camera), Visibility (wipers, defrost, mirrors). 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.
• 10190364Mar 5, 2021Equipment. This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering has releasing updated cals to correct the concern.
• 10190361Mar 5, 2021Engine cooling. This Preliminary information communicates in temperatures below freezing, it may be noticed that exhaust is only exiting from the right hand exhaust tailpipe. The cause of this condition is a low point in left side tailpipe which results in condensation building up at the low point in the tailpipe. In low temperatures the condensation can freeze and form ice limiting the flow of exhaust out of the left tailpipe.
• 10190764Mar 4, 2021Transmission and drivetrain. Customer Satisfaction Program. Certain 2021 model year Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles, equipped with an 8 speed automatic transmission, (RPO MQE), may have a broken reaction carrier in the transmission. Dealers will replace the transmission.
• 10190358Mar 4, 2021Body and structure. This Preliminary information communicates to the dealer technician that the 10L1000 transmission and valve body assembly part restriction has ended. Dealers are advised that these transmissions and valve bodies can now be ordered through the regular GM CCA parts process or PQC process for required dealers (Canada).
• 10190356Mar 4, 2021Body and structure. This Preliminary information communicates that a vehicle may exhibit a misfire condition resulting in misfire codes P0300-P308. Upon diagnosis it may be discovered the lifter has come apart. It is recommended to replace the lifter guide and the four lifters.
• 10191242Mar 3, 2021Electrical system. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Dead Battery and/or Shift to Park Lamp Illuminated On Driver Information Center (DIC).
• 10190762Mar 1, 2021Equipment. Customer Satisfaction Program. Certain vehicles may have a cargo tie down ring made incorrectly available for ordering at the time of vehicle purchase. This cargo tie down ring accessory (RPO 5VI) is only designed to work with a Steel Bed and not a Carbon Pro Bed. Dealers will provide the customer with a reimbursement check in the amount of $100.
• 10190355Mar 1, 2021Body and structure. This Preliminary information communicates to the dealer technician to inspect for a missing 1-2-7-8-R clutch fluid passage seal or incorrect 1-2-7-8-R clutch fluid passage seal being install for a no movement concern after valve body replacement on the 8L45 or 8L90 transmissions.
• 10190354Mar 1, 2021Body and structure, Transmission and drivetrain. This Preliminary information communicates to the dealer technician to replace the valve body on 8 speed transmissions setting DTC P0796 if no debris is found in the transmission fluid pan. If debris is found in the transmission fluid pan the technician is advised to repair the transmission as needed and replace the valve body.
• 10207737Feb 8, 2021Equipment. Stop Delivery Order for Upcoming Customer Satisfaction Program.
• 10188403Jan 29, 2021Suspension, Transmission and drivetrain. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
• 10188401Jan 29, 2021Equipment, Body and structure. This service bulletin provides information for dealers/technicians on accessory all-weather floor liners and flat mats warped or misshapen.
• 10187747Jan 22, 2021Equipment, Fuel system. This informational bulletin advises the tech of a possible normal condition when the vehicle creeps forward during start up conditions when the clutch packs are full of residual oil.
• 10187745Jan 22, 2021Engine. 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.
• 10187769Jan 21, 2021Electrical system, Engine cooling. This bulletin provides a possible location of a bad connection at the reductant fluid tanks electrical connector.
• 10188419Jan 20, 2021Equipment, Electrical system. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Loss of Power, Instrument Panel Cluster (IPC) Gauges are Inoperative and/or Fluctuate, Multiple Warning Lights on DIC.
• 10187770Jan 20, 2021Electrical system, Engine cooling. This technical bulletin provides a procedure to program the reductant fluid module if found the cause of the customers concern.
• 10187767Jan 13, 2021Fuel system, Engine cooling, Equipment. This informational bulletin provides a test procedure, for a possible faulty DEF Heater.
• 10188418Jan 11, 2021Equipment, Electrical system, Engine cooling. 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 heard from the engine compartment, loss of charging and/or reduced alternator output.
• 10187757Jan 11, 2021Fuel system, Equipment. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
• 10187761Jan 5, 2021Equipment, Engine cooling. This informational bulletin explains how the regen works for the DEF system and how it works at different levels.
• 10187735Dec 23, 2020Electrical system, Air bags. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the airbag lamp illuminated on the driver?s information center (DIC).
• 10187429Dec 23, 2020Electrical system, Equipment. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
• 10187379Dec 23, 2020Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 10187202Dec 23, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10186114Dec 23, 2020Air bags, 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 airbag lamp illuminated on the driver?s information center (DIC).
• 10186102Dec 23, 2020Equipment, Electrical system. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
• 10186065Dec 23, 2020Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 10185751Dec 23, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10187736Dec 22, 2020Engine, 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.
• 10187409Dec 22, 2020Body 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.
• 10187389Dec 22, 2020Body and structure. This technical bulletin provides repair information to correct a customer concern of the pickup box being out of alignment.
• 10187201Dec 22, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10186115Dec 22, 2020Engine, 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.
• 10186082Dec 22, 2020Body 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.
• 10186075Dec 22, 2020Body and structure, Equipment. This technical bulletin provides repair information to correct a customer concern of the pickup box being out of alignment.
• 10185750Dec 22, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10187199Dec 21, 2020Air bags. This Preliminary information communicates to dealers there is a known condition with being able to set the Teen Driver PIN and that General Motors Engineering team is working on a correction
• 10185748Dec 21, 2020Air bags. This Preliminary information communicates to dealers there is a known condition with being able to set the Teen Driver PIN and that General Motors Engineering team is working on a correction
• 10187197Dec 18, 2020Transmission and drivetrain. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10187196Dec 18, 2020Electrical system. 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.
• 10185746Dec 18, 2020Engine cooling. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
• 10185745Dec 18, 2020Equipment. 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.

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