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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.

By type

By component

By trouble code

By topic

Bulletins, newest first
PIP5370C2018-08-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, DIESEL. This Preliminary Information communication provides information to the technician that some vehicle may have an “Exhaust Fluid Quality Poor” on the Driver Information Center or a diesel exhaust fluid warning lamp on or other exhaust fluid quality related concerns. Technician will inspect the diesel exhaust fluid for contamination. Technician should use Service Information for Contaminants in Diesel Exhaust Fluid Diagnosis and use special tool J26568 or EN50422 Diesel Exhaust Fluid Refractometer for fluid testing.
PIP5151E2018-08-06. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles that may have a hard start, no start, rough running, or low fuel pressure. Technician may find Diagnostic Trouble Codes P0087, P0088, P0191 and P128E during the inspection. If during the inspection of the fuel system contamination is found the complete fuel system will need to be cleaned and flushed. After the fuel system is cleaned out test the fuel using the latest version of PIT3173.
PIP5508B2018-08-06. Service bulletin. POWER TRAIN. This Preliminary Information communication advises the technician that the Product Quality Center has ended the part restriction for the T87A Transmission Control Module.
PIC5953D2018-08-06. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary Information communication provides information to the technician about vehicles that may have an issue when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone contacts to not have any Emojis loaded to any contact.
PIT5613A2018-08-06. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:ELECTRICAL. This Preliminary information communicates information to the technician about the HVAC pop-up on the radio display may show 61 degrees but the display on the HVAC knobs will show correct temp. Only the radio pop-up is showing the incorrect information. Technicians should not make any repairs. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a soulution.This PI will be replaced with a bulletin once repair information is available.
PIC6326A2018-08-06. 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.
PIT56212018-08-06. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. This Preliminary information communicates a potential issue where there may be a squeak or creak noise from the brake pedal when applied. Engineering is investigating.
PIP5373B2018-08-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This Preliminary Information communication provides the technician with steps on how to program an Engine Control Module when getting a Service Programming System error code E4491 or E4423. In some cases Techline Customer Support Center may need to be contacted to resolve the issue.
PIT5411M2018-08-06. Service bulletin. EQUIPMENT. 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.
PIT56182018-08-06. Service bulletin. EQUIPMENT. This Preliminary information communicates information to the technician about vehicles with a loud notification chime when shutting off the vehicle with an active Bluetooth call. Technicians should not make any repairs or replace any parts. The dealer should communicate to the customer that we apologize for the inconvienience and that General Motors is working on a solution for this concern.
181762018-08-06. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM. 18176 - Customer Satisfaction - Certain vehicles, equipped with the 1.6L diesel engine (RPO LH7), may have a condition where if the engine control module software experiences an internal integrity fault and the transmission may not shift as designed. Reprogram the engine control module.
PIT5399A2018-06-18. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about connectivity concerns when connecting an Apple device via USB cord. Technician should insure the customer is using an original equipment manufacturer Apple USB cable.
PIP5519A2018-06-18. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of the timing chain tesnioner gasket being improperly installed or mis-positioned after major engine repairs causing a low engine oil pressure and dtc p06DE.
PIT5551C2018-06-18. Service bulletin. FORWARD COLLISION AVOIDANCE. This Preliminary information communicatesa "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 theFAB has been set to "Alert".
99-08-51-001D2018-06-11. Service bulletin. STRUCTURE; EQUIPMENT. Thins informational bulletin provides information on Paint-less Dent Repair Process.
17-NA-2762018-06-11. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL. This informational bulletin provides information on Loss of Phone Pairing When Vehicle Shuts Down in Demo Mode and that this is considered a normal characteristic of the vehicle in demo mode.
17-NA-2732018-06-11. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This technical bulletin provides a procedure to add lubricant to the armrest hinge springs if making noise.
17-NA-2652018-06-11. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES. This technical bulletin provides repair information to correct a customer concern of hearing a flutter or boom noise from rear of vehicle.
17-NA-2622018-06-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin provides a procedure to perform a RDCCM update to correct a possible clunking noise from the tcase or rear axle clutches.
17-NA-2542018-06-11. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This New Model Feature Bulletin provides General Information, Training Courses, Special Tools Information and other Topics to help the Service and Sales Personnel Become Familiar with the Features of the 2018 GMC Terrain.
17-NA-2382018-06-11. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL. This informational bulletin provides information for Wi-Fi Hotspots or Data Sharing Feature Not Working once Turned on.
17-NA-2132018-06-11. Service bulletin. EQUIPMENT:OTHER:LABELS. This informational bulletin provides information for the service parts identification (SPID) label replacement.
17-NA-2112018-06-11. Service bulletin. ELECTRICAL SYSTEM. This informational bulletin provides to the technician, locations to check for possible loose or damaged electrical connections that may set a DTC instead of just replacing a part.
PIE04402018-06-11. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Engineering Information ? Sunroof or Sunshade Inoperative.
PIE0433A2018-06-11. 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.