2018 GMC Terrain Technical Service Bulletins

1,345 technical service bulletins (TSBs) are on record for the 2018 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.

• 10155119Nov 14, 2018Electrical system. This bulletin provides a procedure for dealers/technicians to manually adjust Clock.
• 10155113Nov 9, 2018Electrical system, Equipment. This technical bulletin proves a procedure to update the rear infotainment monitors if found the cause of the audio concerns.
• 10155075Nov 8, 2018Engine cooling. This preliminary informational bulletin provides repair information for a customer concern of an engine runs rough with the Check Engine Light (CEL) on/low compression on cylinder with misfire. A technician may find DTC P0300 set.
• 10151825Nov 8, 2018Engine, Equipment. This Preliminary information communicates noises are considered to be normal operating characteristics of the vehicle when shut off. It will not impact the designed performance or reliability of the vehicle.
• 10155101Nov 5, 2018Equipment. This bulletin provides information for use on a Product Assistance Claim (PAC), which is formally known as a Product Allegation Resolution (PAR) claim.
• 10155080Nov 1, 2018Equipment. This engineering informational bulletin is requesting information pictures of windshield, steering wheel and/or door trim panel for product issues covered under warranty.
• 10149065Oct 30, 2018Body and structure. This preliminary information explains a potential issue engineering is investigating into water intrusion into the door passthrough connector and effecting door functions.
• 10147401Oct 23, 2018Equipment. This Preliminary information communicates
• 10147381Oct 15, 2018Electrical system. This Preliminary information communicates information to not replace any parts for Favorites unavailable message intermittently. This PI will be deleted and a bulletin created when new software is available.
• 10147376Oct 12, 2018Equipment. This Preliminary Information communication provides information to the technician being unable to program fobs to the vehicle. Technician will need to ensure the key FOB is a new unit and has not been programmed to another vehicle previously.
• 10147367Oct 10, 2018Equipment. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
• 10147364Oct 9, 2018Engine. This Preliminary information communicates additional diagnostics to assist the dealer technician with diagnosing and repairing trouble code P2097.
• 10147363Oct 9, 2018Engine, Equipment. This Preliminary information communicates to the technician where to find the engine identification tag and what information on that tag to use during programming of someengine control modules.
• 10147358Oct 9, 2018Engine, Engine cooling. This Preliminary information communicates the possibility of a crank no start or extended crank condition due to exhaust cam reluctor being out of position.
• 10147355Oct 5, 2018Equipment. This Preliminary Information communication advises the technician that the restriciton on ECM part numbers 55501366, 55502052 and 55485591 has ended.
• 10147348Oct 3, 2018Fuel system. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
• 10207717Sep 6, 2018Electrical system. Emission Recall. Customer Mailing completed September 4, 2018.
• 10144476Aug 28, 2018Equipment. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
• 10144475Aug 28, 2018Engine cooling, Engine. This Preliminary Information communication provides information to the technician related to vehicles that have a Malfunction Indicator Lamp on. A technician may find Diagnostic Trouble Code P050D set as current or history. The technician is advised to first perform the SI diagnostic. That if the diagnostic fails to isolate the concern, then replace only the exhaust side SHLA's (Stationary Hydraulic Lash…
• 10144464Aug 20, 2018Lane departure. This Preliminary Information communication provides information to the technician with additional information on the functionality of Lane Keep Assist.Starting with2016 model year Lane Keep Assist Regular Production Option Code (UHX) replaced Lane Departure Warning Regular Production Option Code (UFL). Lane Keep Assist is designed to assist the driver in keeping the vehicle from drifting out of a driving lane that…
• 10144451Aug 8, 2018Engine. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
• 10144449Aug 8, 2018Engine cooling. 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.
• 10145170Aug 7, 2018Engine cooling. 18239 - Emissions Recall - General Motors has decided to conduct a Voluntary Emission Recall involving certain 2018 model year vehicles, equipped with 4-cylinder engines (RPO LHN, LEX, L3A, LYX, LKN, LE2, LCV or LTG). On some vehicles, an electrical connection in the circuit board may fail in the engine control module. If this occurs, a malfunction indicator lamp (MIL), such as the Check Engine Light may…
• 10144426Aug 3, 2018Equipment. This preliminary information is regarding a potential for a noise concern when using the HVAC. Engineering is aware and is investigating this concern.
• 10145168Aug 2, 2018Steering. 18245 - Service Update - A 250-millisecond power steering instability occurs as soon as APA (Advanced Park Assist) begins turning the steering wheel into a parking spot. If steering wheel shudder occurs, APA aborts the procedure. Reprogramming of PSCM (Power Steering Control Module).
• 10143785Jul 30, 2018Fuel system. 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…
• 10143779Jul 25, 2018Engine cooling. This Preliminary Information communication provides the technician with the diagnosis and repair steps for a vehicle with a check engine light on with Diagnostic Trouble Code P015B or a reduced engine power message with Diagnostic Trouble Code P1101. Technician should look for a missing or damaged O-ring seal in the charge air cooler coupler.
• 10143763Jul 12, 2018Engine, Equipment. This Preliminary Information communication advises the technician that the ECM part numbers 55501366, 55502052 and 55485591 will be placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
• 10143758Jul 9, 2018Equipment. This Preliminary Information communication provides information to the technician on how to tell the difference between the integrated center stack, the radio, the human machine interface, and the vehicle communication interface module. There are pictures of all the individual modules for identification purposes.
• 10143755Jul 3, 2018Body and structure. This preliminary information explains a potential issue engineering is investigating into water intrusion into the door passthrough connector and effecting door functions.
• 10143752Jul 3, 2018Visibility (wipers, defrost, mirrors). This Preliminary Information communication advises the technician the steps on diagnosing the concern. Customer's sunroof operation intermittent, bind, noise, auto-reverse, and/or water leaks.
• 10143452Jun 21, 2018Brakes. This Preliminary information communicates a potential issue where the brake pedal may be soft or spongy feeling caused by air trapped in the hydraulic brake system.Engineering is investigating thisconcern.
• 10143449Jun 20, 2018Equipment. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
• 10143742Jun 19, 2018Engine cooling, Engine. 18209 - Service Update. Certain vehicles equipped with a 1.6L diesel engine (RPO LH7), may have been built with an improper alignment of the clamp/gasket assembly connecting the turbocharger to the catalytic converter. This condition may cause a diesel exhaust leak and/or smoke from the underhood area of the vehicle. In addition, a check engine indicator may set with diagnostic trouble code P0421.
• 10143448Jun 19, 2018Engine cooling, Fuel system. 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.
• 10143447Jun 18, 2018Fuel system, 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…
• 10143444Jun 15, 2018Transmission and drivetrain. This Preliminary Information communication advises the technician that the Product Quality Center has ended the part restriction for the T87A Transmission Control Module.
• 10143443Jun 14, 2018Equipment. 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.
• 10143441Jun 14, 2018Equipment. 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.
• 10143436Jun 12, 2018Equipment. 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.
• 10143431Jun 12, 2018Brakes. 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.
• 10143429Jun 11, 2018Engine, Electrical system. 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.
• 10143736Jun 8, 2018Electrical system, Engine. 18095 - Service Update. Certain 2017 ? 2018 model year Cadillac CTS A, 2018 model year Cadillac ATS, and 2018 model year GMC Terrain vehicles have a condition where a portion of the engine control module (ECM) memory is erased following the programming of other modules in the vehicle. The ECM memory is used to store On Board Diagnostic (OBD) data, such as certain emission diagnostic OBD data, that is to be retained…
• 10143427Jun 8, 2018Equipment. 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.
• 10143423Jun 4, 2018Equipment. 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.
• 10143732May 24, 2018Transmission and drivetrain, Engine. 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.
• 10143420May 24, 2018Transmission and drivetrain, Engine cooling, 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.
• 10141371May 23, 2018Equipment, 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.
• 10141354May 15, 2018Equipment, 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.
• 10141351May 11, 2018Forward 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".

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