GMC Terrain Complaints (2015)

299 consumer complaints on file.

#11638001January 23, 2025
ENGINE
Clogged manifold and engine head. Blockage buildup in manifold and Pcv valve causing exhaust problems. Oil sludge block air in head and manifold causing CEL to come on. And these vehicles drink engine oil like water. Gives code P0411
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11637620January 22, 2025
ENGINE
There is a well known piston ring gasket issue with various GMC Terrain model years. GMC had recalled some for the engine defect but not all years with the affected engine. The 24L Eco tec engine is faulty. The motor uses excessive amounts of oil between oil changes and all kinds of systems are affected by carbon buildup. The engines run rough and stall out WHILE DRIVING. GMC refuses to recall all of the vehicles with this problem and that includes my 2015 model year GMC Terrain with the 24L engine. This would cost me thousands to fix myself. This is a serious issue and also a safety issue that they can get away with selling such faulty vehicles to families and no one makes them fess up and fix the engines at their expense not ours. My wife has had the vehicle stall out constantly while driving and with our partially disabled child in the car. It has happened countless times to me as well. This will also eventually cause the motor to have a much shorter life. There is also a chance of the timing chain breaking and causing the engine to break. These defects should be fixed via a recall. This is a WELL KNOWN MANUFACTURER DEFECT please look it up. It affects thousands of GMC Terrains and other GM vehicles with the 24L Ecotec motor.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11614513September 13, 2024
ENGINE
The contact owns a 2015 GMC Terrain. The contact stated while the vehicle was parked, the contact turned off the vehicle and removed the key and the vehicle was shaking and shuddering until the vehicle independently turned off. The contact stated that there was an oil leak and oil was being added every four days. The contact stated that coolant was also frequently added. The contact stated that the vehicle was taking to an independent mechanic where the contact was informed that the engine needed to be replaced; however, the vehicle was not repaired. The contact stated while driving 45 MPH, the engine power reduced message was displayed, and the vehicle decelerated to 20 MPH. The vehicle was towed to the residence and the vehicle was not diagnosed or repaired by independent mechanic or the dealer. The manufacturer was not notified of the failure. The failure mileage was 100,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11614417September 13, 2024
FUEL SYSTEM, GASOLINE, ENGINE AND ENGINE COOLING
The contact owns a 2015 GMC Terrain. The contact stated that while at a complete stop, the vehicle jerked and shut off. The check engine warning light was illuminated. The contact was able to restart the vehicle and continue driving. The contact stated that on several occasions, while the vehicle was jerking at a complete stop, the contact shifted to park(P) to prevent the vehicle from stalling. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the fuel pump was leaking fuel into the oil gasket. The mechanic replaced the mass air flow sensor, the oil gasket, the fuel pump, the catalytic converter, and the starter; however, the failure recurred while driving. The dealer was notified of the failure and informed the contact that the VIN was not included in an unknown related recall. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 127,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11598695July 3, 2024
ENGINE, UNKNOWN OR OTHER
While driving, my vehicle makes a loud funny sound, jerks/skips, and shuts off. It also loses motor oil quickly, yet it has no leaks and I have to constantly add more motor oil or get oil changes frequently. My safety has been put at risk because the engine can fail at any moment due to no motor oil, causing the vehicle to catch fire and also when the vehicle suddenly stops and shuts off in the middle of the road, it can cause an accident. There has been no inspection from the manufacturer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11587789May 9, 2024
ENGINE
The contact owns a 2015 GMC Terrain. The contact stated that after starting the vehicle, the message "Power Reduction Mode" was displayed, and the vehicle stalled. The contact stated that after restarting the vehicle, there was a ticking sound coming from the engine compartment before the vehicle stalled another time. The vehicle was towed to the local mechanic who diagnosed the vehicle and determined that the engine timing was faulty, and the engine had experienced a loss of engine compression. The contact was advised to contact a local dealer for service. The vehicle was not repaired. The manufacturer and local dealer were not yet contacted. The failure mileage was 160,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11584779April 23, 2024
ELECTRICAL SYSTEM
I am writing to urgently request a safety recall for the GMC Terrain 2015 due to a critical issue with the lift gate mechanism, which may be both electrical and mechanical. Recently, while utilizing the lift gate for routine activities such as grocery shopping, a terrifying incident occurred that endangered the safety of my family members. Upon opening, the lift gate exhibited a concerning behavior, forcefully closing without warning or control, posing a severe risk of injury. Despite attempts to intervene, the gate continued its downward motion unabated, presenting a serious hazard of crushing limbs or causing incapacitating harm. In a frightening moment, one of my family members narrowly avoided a potentially catastrophic injury as the gate threatened to strike her right hand. While I sustained a minor injury to my arm, a superficial wound, the gravity of the situation cannot be understated. This dangerous malfunction persists, rendering the trunk unusable out of fear for the safety of myself and my loved ones. Given the potential for life-altering injuries, I implore you to take immediate action and initiate a recall for all GMC Terrain 2015 models affected by this defect. The safety of consumers should be the utmost priority, and failure to address this issue promptly could result in devastating consequences. I urge you to prioritize this matter and take decisive steps to remedy the situation before further harm occurs. Your swift action in initiating a recall will not only safeguard the well-being of countless individuals but also uphold the reputation of your brand for prioritizing customer safety.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11583433April 16, 2024
ENGINE
Terrian with 2.4v have a massive oil burning problem. I have to put at least 2 quarts of oil in my car a week to get oil in it. There is problem with them during oil or oil rings are junk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11581712April 8, 2024
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
status display screen shows multiple false signals
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11580714April 2, 2024
ENGINE
Vehicle has been consuming oil quicker than normal with no known reason as to why. Vehicle has also had 2 incidents of the vehicle not starting and no engine light or codes appear after vehicle gets started.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11576994March 12, 2024
FUEL SYSTEM, GASOLINE
The contact owns a 2015 GMC Terrain. The contact stated that while driving at an undisclosed speed and coming to a complete stop, the accelerator pedal was released, and the vehicle sputtered. The check engine warning light was illuminated. The message "Reduced Engine Power" was displayed. Additionally, the contact stated that the vehicle would shut off while idling unless the accelerator pedal was intermittently depressed. The contact also stated that the vehicle had failed to respond while depressing the accelerator pedal. The vehicle was taken to Firestone on several occasions, and the high-pressure fuel pump (HPFP) was replaced 3 times; however, the failure persisted. The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 130,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11572310February 16, 2024
BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING, LANE DEPARTURE: BLIND SPOT DETECTION, BACK OVER PREVENTION: WARNINGS
The blind spot detection sensors have failed and the rest of the detection systems using the bad sensors are also non functional. An alert is shown in the info center every time the car starts. I have read that the issue is due to poor positioning of the sensors allowing for tire spray to directly hit the non water resistant sensors and their connectors. The replacement parts and labor are ridiculously expensive and the ability for an owner to complete this task is nearly impossible. A simple splash guard behind the tire or even waterproofing the sensor and it’s entirety to avoid water penetrating and causing the very expensive sensor and all detection systems connected to it to fail.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11572057February 15, 2024
ENGINE
Engine timing chain broke car stop working in the middle of the road
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11571154February 10, 2024
ELECTRICAL SYSTEM
The vehicle tends to not turn on unless I give it a boost. Battery is new and alternator is good It occurs twice to three times a day
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11571010February 9, 2024
ENGINE
The rear main seal for the engine fails because of a clogged PCV valve. This was a problem on previous years for the Terrain and other vehicles that carried a similar type of engine. There was a recall for those previous years (2011-2014). My vehicle is a 2015 GMC Terrain, and I am currently experiencing the same issue. I took my vehicle to a licensed dealership and they quoted me a price of close to $3,000 to make the necessary repairs. In my opinion, since the same issue/problem is occurring, there should be a recall issued to include at least the 2015 year models for that engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11568652January 29, 2024
AIR BAGS
I have a failure occurring with the air bag system in my 2015 GMC Terrain SLE. There seems to be other air bag issues with this vehicle. This is yet another problem. I am aware that there is a technical bulletin that the manufacture has published concerning the failure I am experiencing, but there appears to be no recall. Specifically, I have a service air bag light on in the vehicle. The problem has been diagnosed to be the failure of the air bag passenger presence module. Since this is a safety feature, it seems it would warrant more than a technical bulletin.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11566871January 22, 2024
ENGINE
The front and rear seal of the engine went out in the matter of two weeks spraying oil all over the roadway and making to car not drivable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11565018January 12, 2024
ENGINE
My Car is using oil excessively. I need to add about 1 1/2 to 2 quarts weekly. I only drive about 40 each week.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11563212January 3, 2024
POWER TRAIN
There have been problems with the 2015 GMC Terrains Timing chain. The timing chain will break when the vehicle is being operated which causes the driver to lose complete control of the SUV, additionally, the engine will be destroyed. The bigger issue is the loss of control when you are driving - especially at highway speeds. GMC had hundreds of complaints but refused to issue a recall. A recall was issued but for only certain batches of VINs. I contacted GMC corporate service to inquire about what they are doing for the other owners who are experiencing the symptoms before the chain breaks. The representative told me they were only recalling certain VINS, I explained that it was not a fluke that my car was experiencing the same issues as the recalled ones. The response was they weren't recalling my VIN. I inquired why there were only some, not all, and she said it depends on what time of day the car was assembled the weather, and the place. Just bizarre this answer, my vehicle is the exact vehicle model that is being recalled and is experiencing the same problem - it makes no sense. So if I am driving on the highway or any road USA and my chain breaks I may kill myself as well as others. Then there is the cost to repair this defective part, by recalling certain VINs they are acknowledging there is a defect that they are responsible for. I want my vehicle repaired at the expense of GMC as they are the cause of the issue. I don't want to die or kill anyone. Can you please help me and many other owners who are dismayed and just confused and angry? My car is now stalling out while I am driving, or moving at all.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11563213January 3, 2024
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
The automatic emergency braking system just goes off without any reason, causing the vehicle to considerably slow down if not stop. This happens several times a week if not multiple times a day again for no reason. There is no advance warning , it just happens.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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