2021 GMC Terrain Technical Service Bulletins

696 technical service bulletins (TSBs) are on record for the 2021 GMC Terrain. 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.

• 10251635Mar 4, 2024Equipment. This service bulletin provides information on All hazmat parts being returned to the Warranty Parts Center (WPC) must be shipped using Central Transport. Hazardous materials should never be sent by air transportation to the WPC.
• 10251513Mar 1, 2024Other or unknown. This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
• 10251714Feb 23, 2024Electrical system. This Preliminary information communicates a vehicle may come to the dealer with a complaint of no start, stalling, rough idle, no acceleration, loss of power, erratic shifting, fuel gauge inoperative, MIL illuminated with various codes stored. Technicians are directed to replace the K111FPDCM if any of these conditions can be validated.
• 10250775Feb 22, 2024Engine cooling. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
• 10251704Feb 21, 2024Forward collision avoidance. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
• 10250546Feb 15, 2024Body and structure, Engine cooling, Electrical system. This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• 10250505Feb 7, 2024Engine cooling, Fuel system. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
• 10250503Feb 7, 2024Engine cooling. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 10250347Feb 2, 2024Transmission and drivetrain, Engine cooling. This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
• 10250007Jan 31, 2024Equipment. This Preliminary information communicates an issue where the vehicles wireless charger no longer works with certain ISO updates on Apple 15 phones and advises customer to update their phone to the lastest ISO update.
• 10250276Jan 30, 2024Equipment, Electrical system. This service bulletin provides information on the EL-52800 Diagnostic & Charge Battery Station (DCBS) – FAQs.
• 10250278Jan 29, 2024Equipment, Electrical system. This service bulletin assists technicians in setting up PicoScope hardware/software to monitor CAN bus traffic (voltage patterns) to aid Technical Assistance (TAC) and Field Service Engineers (FSEs) in diagnosing electrical issues present on network communication circuits.
• 10250274Jan 29, 2024Engine cooling, Steering, Seats. This technical bulletin provides a procedure to replace the radiator brackets if found loose to correct a customer concern of excessive vibration in the steering wheel or seat or floor at idle or at low to moderate speeds.
• 10250248Jan 23, 2024Transmission and drivetrain. This service bulletin provides information on a normal characteristic of a transmission that will not shift into overdrive range during cold ambient temperatures.
• 10250244Jan 18, 2024Body and structure. This preliminary informational (PI) bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
• 10249764Jan 18, 2024Electrical system, Body and structure, Seats, Equipment. This service bulletin provides a procedure to check for water intrusion at the door electrical connectors and repair the wiring if found the cause of customer concerns of Power Windows and/or Mirrors Inoperative, Power Seat Movement Inoperative and/or Moving On Its Own, Side Object Detection Inoperative and/or Unwanted Activation, Power Door Lock Cycle Inoperative, Keyless Entry Inoperative.
• 10249739Jan 18, 2024Body and structure. This technical bulletin provides repair information to correct a customer concern of finding a water leak inside the interior of the vehicle.
• 10249604Jan 17, 2024Equipment, Visibility (wipers, defrost, mirrors). This technical bulletin provides a procedure for air conditioning refrigerant desiccant replacement due to A/C Not Cooling or refrigerant loss.
• 10249611Jan 16, 2024Electrical system, Back-over prevention (rear camera). This technical bulletin provides a procedure to add reflective butyl tape to the rear driver's side module to correct the radar reflection being detected and triggering the false alerts.
• 10249590Jan 16, 2024Equipment. This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
• 10249980Jan 12, 2024Equipment. This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challenging complaints to accurately diagnose and repair. Technician will need to use Pico Oscilloscope Diagnostic Kit to effectively diagnosis vehicles. Technician should drive the vehicle will using the Pico Oscilloscope to record data. After the data is recorded it should be…
• 10249579Jan 12, 2024Engine cooling, Transmission and drivetrain. This PI bulletin advises the technician on the proper way to install the pistons in an engine.
• 10249011Jan 12, 2024Exterior lighting. This informational bulletin provides information for dealers/technicians on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage.
• 10249535Jan 8, 2024Electrical system. This preliminary information (PI) provides information om Service Programming System (SPS) Error Codes (E4398, E4399, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or E6961).
• 10248704Dec 21, 2023Electronic stability control, Engine cooling, Electrical system, Transmission…. This service bulletin provides a procedure to locate and repair the engine wiring harness to correct customer concerns of multiple electrical issues.
• 10249295Dec 18, 2023Equipment. This Preliminary Information communication provides information to the technician about the use of J-35616-64B terminal test probe, replacement terminals, and terminated leads. The J-35616-64B is the latest test probe released for checking tension or probing the .64 series terminals. The test probe terminal has been released in the terminal repair kit (J-38125-620H) located in Lear Tray 7 part number 963716-2.
• 10249294Dec 15, 2023Other or unknown, Electrical system. This Preliminary information communicates a GM part number for reflective high temperature heat or insulating tape when repairing wiring harnesses.
• 10249286Dec 13, 2023Equipment. This Preliminary information communicates an issue where the vehicles wireless charger no longer works with the latest ISO update on Apple 15 phones.
• 10247552Dec 12, 2023Equipment. This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
• 10249281Dec 8, 2023Equipment. This Preliminary information communicates an issue where the vehicles wireless charger no longer works with the lastest ISO update on Apple 15 phones.
• 10247192Dec 8, 2023Engine cooling, Equipment, Electrical system. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
• 10249270Dec 6, 2023Equipment. This Preliminary information communicates an issue where the vehicles wireless charger no longer works with the lastest ISO update on Apple 15 phones.
• 10245570Nov 16, 2023Electrical system, Transmission and drivetrain. This service bulletin advises the tech that the rotational Clicking Noise Heard After Engine Shut Down may be normal characteristics of the vehicle.
• 10245559Nov 16, 2023Exterior lighting, Engine cooling, Equipment, Electrical system. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
• 10246218Nov 15, 2023Electrical system, Equipment. This technical bulletin provides repair information to correct a customer concern of Vehicle Will Not Lock and Unlock (Loss of Active Functions) Crank or Start (Loss of Passive Functions) with DTC P0513 Set.
• 10245582Nov 15, 2023Equipment, Electrical system. This service bulletin provides repair information to correct a customer concern of No Crank, No Start, Quick Start/Stall, No FOB Detected, Key FOBs Inoperative, B3924 00, B3925 00, B3926 00, B3927 00, B3928 00 Set.
• 10247352Nov 14, 2023Suspension. This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer?s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center.
• 10247351Nov 9, 2023Forward collision avoidance. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
• 10245399Nov 8, 2023Equipment, Engine cooling, Body and structure. This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• 10245395Nov 6, 2023Suspension, Wheels, Steering, Transmission and drivetrain, Engine cooling. 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.
• 10245250Oct 30, 2023Wheels. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10245248Oct 25, 2023Equipment, Electrical system. This service bulletin assists technicians in setting up PicoScope hardware/software to monitor CAN bus traffic (voltage patterns) to aid Technical Assistance (TAC) and Field Service Engineers (FSEs) in diagnosing electrical issues present on network communication circuits.
• 10245196Oct 19, 2023Electrical system. This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• 10245201Oct 16, 2023Equipment, Electrical system. This service bulletin provides repair information to correct a customer concern of OnStar Inoperative after Importing Vehicle from Canada to the United States.
• 10244326Oct 11, 2023Equipment. This service bulletin provides information on General Motors Dealership Critical Equipment Requirements and Recommendations.
• 10244274Oct 6, 2023Wheels. This service bulletin provides information about the Hunter wheel Road Force balancers that should be utilized for all repairs requiring balance and Road Force measurement.
• 10244273Oct 6, 2023Engine cooling. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 10245986Oct 4, 2023Other or unknown. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
• 10244315Oct 3, 2023Equipment. This Warranty Administration bulletin provides information on the Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program.
• 10244202Sep 28, 2023Wheels, Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).

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