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Service bulletins for the 2018 GMC Terrain

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1345 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
18NA0422018-05-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. This technical bulletin provides a procedure on reprogramming the ICS to correct a condition of Air Filter Life Check System Message Displayed due to a software anomaly.
18NA0412018-05-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to reprogram the HVAC module to correct a condition of HVAC Inoperative during Remote Start Event with Accessory Remote Start Kit due to a calibration concern.
18NA0322018-05-21. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING:TURN SIGNAL:SWITCH. This technical bulletin provides a procedure to replace the turn signal switch with the correct one due to the wrong one being installed at the plant.
18NA0622018-05-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; ENGINE. This informational bulletin provides the tech to refer to a field action 17337 to update the ECM to the latest calibration available.
PIT5195D2018-05-21. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.
PIP55632018-05-21. Service bulletin. ELECTRICAL SYSTEM:WIRING; ENGINE. This Preliminary information communicates of possible chafed wire in the engine harness that is routedon top of the trans assembly.
180362018-05-07. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. 18036 - Service Update. Certain vehicles without an auto high beam option (RPO TQ5) may have been assembled with the incorrect high beam turn signal multifunction switch (TMFS). When customers press the auto high beam button on the high beam TMFS switch nothing will happen. High beams will operate if the customer push/pulls the TMFS. Dealers are to replace the TMFS, and inform the customer that their vehicle is not equipped with the auto high beam feature.
17328-02 (Bullet2018-05-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 17328-02 - Customer Satisfaction ( Update Procedure Revised). Vehicles need to be reprogrammed with an updated software package. This new software package will provide changes to the climate control system, certain audio features and the in-vehicle navigation system so they continue to function properly. The changes will also prevent instances of intermittent system lock-up. OnStar will update vehicles remotely through in-vehicle prompts from the radio display. However, some customers may decline the vehicle update or the update is attempted, but is not successful. In such cases, and in all export markets, dealers will be required to reprogram the vehicle with the new software package.
17337 (Bulletin2018-05-07. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. 17337 - Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles, equipped with a diesel engine. The engine control module in these vehicles may not properly diagnose a fault in the exhaust particulate matter sensor. Additionally, a subset of these vehicles, certain vehicles, may in rare instances exhibit a condition in which the engine surges up to 2,800 RPM during vehicle coast or vehicle braking. Dealers will program the engine control module, and transmission control module when applicable.
17NA3302018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. This informational bulletin provides information for the customer to pair their phone in order for the push to talk button on the steering wheel control to work.
150603002H2018-04-23. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This informational bulletin provides information on approved warranty part numbers for original equipment batteries
17337 Phase 22018-04-02. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. 17337 01 Phase 2 - Product Emission. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles, equipped with a diesel engine. The engine control module in these vehicles may not properly diagnose a fault in the exhaust particulate matter sensor. Additionally, a subset of these vehicles, certain 2017 model year Chevrolet Silverado HD and GM Sierra HD vehicles, may in rare instances exhibit a condition in which the engine surges up to 2,800 RPM during vehicle coast or vehicle brakingProgram the engine control module, and transmission control module when applicable.
PIT5587A2018-03-12. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This preliminary information explains that there is a software issue causing the driver mode switch to not change modes , that engineering has released new calibrations to address this concern.
PIP4670E2018-03-12. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.
PIC5650D2018-01-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
PIC5491K2018-01-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have an OnStar system that will not power up. Technician should turn off the ignition and cancel retained accessory power. After the vehicle has powered down remove power to the OnStar module for five minutes. After the power has been removed for five minutes, if the OnStar system is working release the vehicle. If the OnStar system is still inoperative continue with published Service Information diagnostics.
17-NA-2442017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Information on How to Prevent Inadvertent Vehicle Starting from Key Fob or OnStar Mobile Application and where to locate the information for future use.
17-NA-2422017-12-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides to the tech the new version of SPS that will prompt warnings when trying to reprogram modules that have been already reprogrammed.
PIT55972017-12-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM:SOFTWARE. This preliminary information was created to communicate a software issue not allowing the HVAC to turn on when the vehicle is remote started. It functions correctly when started regularly. Engineering will release a calibration to fix this in the future.
PIC3100F2017-12-14. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This Preliminary Information communication provides information to the technician about vehicle's odometer appears to be inaccurate relative to a known distance traveled. Technician should obtain a hand-held GPS unit to test the odometer. If a hand held GPS unit is not available, the only other option is to verify the miles traveled using a surveyor's wheel or a dynamometer.
PIP5496A2017-11-14. Service bulletin. FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM. This Preliminary information communicates an issue inside the fuel tank where the fuel vent hose may be disconnected from the fuel pump module assembly and recommended repair procedures.
PIP5508A2017-11-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. This Preliminary Information communication advises the technician that the Product Quality Center has a part restriction for the T87A Transmission Control Module. The dealer technician is advised to call the GM Product Quality Center for further assistance.
PIC5650C2017-11-14. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
PIC6048H2017-11-14. Service bulletin. ELECTRICAL SYSTEM; LANE DEPARTURE: WARNING. This Preliminary Information communicates to thetechnician that some customers may comment on the operation of their haptic seat during a Lane Keep Assist event. Lane Keep Assist works differently than Lane Departure Warning. The Lane Keep Assist icon is solid amber, Forward Camera Module is actively commanding a torque to Electronic Power Steering. This means that the driver should also feel some feedback from the steering wheel. No Chimes or haptic in the seat. Lane Keep Assist icon is flashing amber; Forward Camera Module is actively commanding torque to Electronic Power Steering. This will also be accompanied with Lane Departure Warning chimes and haptic in the seat feedback based on the setting chosen in the vehicle settings. This will take place when the vehicle has crossed lane marking by (40 cm) or (15.75 in).
PIT55902017-11-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates to the technician, that they may be working on a concern of a Service Driver Assist System Message with B172E stored in history Do not replace any parts. Engineering is aware of the issue and a new control module is in development and will be available Q1 2019.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.