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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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Bulletins, newest first
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.
17NA4052018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This technical bulletin provides a procedure to replace the radio to correct the condition of Intermittent White Radio Screen When Starting Vehicle and/or Radio Resets Shortly After Start-Up with a Phone Paired due to an internal radio concern.
18NA0802018-05-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. This technical bulletin provides a procedure on how to install an oil heater on the oil pan and how to route/mount the wiring harness.
18NA0732018-05-21. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Bulletin provides graphics, information and guidelines for engine component wear that require repair and not engine replacement.
18NA0672018-05-21. Service bulletin. WHEELS; SERVICE BRAKES. This informational bulletin provides information for cleaning brake dust off of aluminum or chrome wheels.
18NA0362018-05-21. Service bulletin. STRUCTURE:BODY:ROOF AND PILLARS. This technical bulletin provides repair information to correct a customer concern of hearing high pitched whistle, wind noise coming from the roof of the vehicle.
18NA0652018-05-21. Service bulletin. SERVICE BRAKES. This technical bulletin provides a procedure to replace the brake booster if the build date of the booster falls within a certain date due to the booster causing a Clunk Noise When Applying Brakes.
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.
16NA3382018-05-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This Bulletin provides guidelines 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.
17NA4112018-05-21. Service bulletin. STRUCTURE; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of the headliner sagging at the front.
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.
PIT56082018-05-21. Service bulletin. STRUCTURE:BODY:DOOR. This preliminary information explains a potential issue engineering is investigating into water intrusion into the door passthrough connector and effecting door functions.
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.
PIC63262018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary information communicates to the technician that GM is investigating a condition of a red OnStar LED. The technician is advised what DTC codes may be present, and not to replace any components at this time. Further information will be provided when the investigation is concluded.
PIT5411K2018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Preliminary Information communication advises the technician that the Human Machine Interface, Radio or Tuner, radio controls, Integrated Center Stack, and displays are placed on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
PIC63252018-05-21. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Preliminary Information communication advises the technician that the Human Machine Interface, Radio or Tuner, radio controls, Integrated Center Stack, display, and Media Disc Players are placed on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance. When the Technician is working on the Regular Production Option Code (IOR) radio, the Technician should review the Diagnostic Starting Point Chart
17337 022018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. 17337 02 Phase 3 - 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.
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.
17337 01 (Bullet2018-05-07. Service bulletin. ENGINE AND ENGINE COOLING. 17337 01 - 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.
17427 (Bulletin2018-05-07. Service bulletin. STRUCTURE; TRAILER HITCHES. 17427 - Service Update. Certain vehicles equipped with a trailer package (RPO V92) may have a trailer turn signal and brake lamp that is inoperative on a connected trailer due to an incorrect calibration. Dealers are to reprogram the body control module.
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.
17396 (Bulletin2018-05-07. Service bulletin. TRAILER HITCHES; EQUIPMENT. 17396- Customer Satisfaction. Certain vehicles were supplied with a vehicle owner manual that overstates the intended un-braked trailer weight by up to 1000 lbs. Dealers should print and insert the revised owner manual page(s) included in this bulletin.
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.
PIE04362018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. This engineering information is requesting information from the field on vehicles that have the condition of Speaker Rattle, Speaker Crackle, Poor Sound Quality, Speaker Pop, or Speaker Distortion.
PIE0433A2018-04-23. Service bulletin. FUEL SYSTEM, GASOLINE. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Engineering Information ? Malfunction Indicator Lamp (MIL) On DTCs P0171 Fuel Trim System Lean Bank 1 and/or P0174 Fuel Trim System Lean Bank 2.

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