GMC Terrain Complaints (2018)

226 consumer complaints on file.

#11490139October 20, 2022
ENGINE
Camshaft failed during driving causing vehicle to become disabled in the roadway and almost hit many times. The camshaft is being repaired by ase certified mechanic at an independent service center. A reduced power notice cam on a few minutes prior to the failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11489252October 14, 2022
SERVICE BRAKES
Brakes go to floor an brake peddle starts to vibrate, (lost of brakes ) Brake assist light comes on. Vehicle has 27000 miles . Problem started at 6000 miles an was brought to GMC service centers 3 times for same issue. They replaced 3 different parts at a total cost of1600 dollars. Brake system is being replaced one part at a time at my expense, GMC has no clue what problem is. Will not admit there is an issue? Just got vehicle back for 3rd time an 3rd new part .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487571October 3, 2022
ENGINE, POWER TRAIN, VEHICLE SPEED CONTROL
When driving the car at low speeds, or right after having been stopped for a few moments. Upon, acceleration, the car will sometimes go into a limp mode. On the DIC, will be displayed a warning about how the car will have the speed reduced after 175 miles and to check the emissions system. The speed has already been reduced at that point. Also displayed maybe a warning about how the power has been reduced. USUALLY, if I turn off the car and wait about a minute, I can restart the car and drive at a normal highway speed again. But not always. The warning on the DIC, will usually turn off if the car does return to normal speeds after about 5 - 10 miles. However, the check engine light may still stay on for several days. This problem can be a daily occurrence. I've had the car in the shop several times, and they have been unable to fix the problem. The car can be unpredictably unsafe, when speed is instantly reduced to 30 mph!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11484576September 15, 2022
POWER TRAIN, SERVICE BRAKES, HYDRAULIC
The contact owns a 2018 GMC Terrain. The contact stated while driving at various speeds, the brakes became inoperable. While the vehicle was in park(P), the gear shifter inadvertently shifted into an unintended gear. The brake assist warning light was flashing. The vehicle was taken to the local dealer where it was diagnosed that the vacuum pump and brake booster needed to be replaced. The vehicle was repaired four times but the failure persisted. The manufacturer was contacted and informed the contact to take the vehicle to a local dealer if the failure recurred. There was no additional assistance provided. The approximate failure mileage was 131,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11483976September 12, 2022
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Vehicle stuck in emergency assist mood. Without warning I couldn't slow down/stop without putting alot of my weight on the brake breaks were so hard to press down.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11483176September 6, 2022
SERVICE BRAKES
When trying to brake, brake pedal became extremely hard to push and Repair brake assist notification and check engine light came on
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11482865September 4, 2022
SERVICE BRAKES
Vacuum pump went out brakes hard to push and I know gmc had a recall for this issue on other vehicles as well previously.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11481807August 29, 2022
SERVICE BRAKES
Brake has to be pushed all the way down HARD to stop, brake assist warning comes up. I’ve had the car for less than 2 years and it’s way too new for anything to go out. Undriveable unless it’s fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11479883August 18, 2022
AIR BAGS
The Safety Restraint System warning keeps coming on and off as well as the air bag light. It happened months ago so I took it in and got it looked at and scanned. All the seatbelts were checked and the scan came back with nothing. Then it stopped for a couple months and now it has started again. Ive had 14 surgeries in the last little less than 4 years and I'm about to go into my 3rd back surgery since November. I cannot get into an accident and not have airbags as I've also had brain surgery 3 winters ago as well. I am disabled and do not have a ton of money either for fixes that aren't necessary but this safety issue is crucial to me. I see that many 2018s have been recalled for the exact same issue that I'm having however mine doesn't come up with that but it is happening to me so that should be included. I also need some direction if not as to why this is happening because I cannot afford to have a dealership, no less, replace every tiny little thing looking for the culprit at $150 an hour when I live on $1,200 a month and most goes to medical. Please advise on what to to or where to start. Thank you.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11476977August 1, 2022
SERVICE BRAKES
While getting off the interstate, the brakes failed with no prior warning, or issues. The brake pedal became extremely difficult to depress and stopping distance was greatly increased. Could not come to a complete stop without using the emergency brake. We drove home (about 2 miles from the interstate exit) and about a half mile after the brake failure, a "service brake assist" light illuminated. Vehicle was towed to dealership the next morning. The problem was the vacuum pump exploded and caused vacuum to the brake booster to be lost, making the pedal difficult to push. Luckily this happened at 11pm and there was nobody in front of us, there definitely would have been a collision.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11476607July 29, 2022
TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
At ignition, vehicle tire pressure monitoring system indicated low tire pressure in rear right wheel of 9psi; right front tire indicated 38psi and left front and rear indicated 38psi. Driver verified pressure as good at 38psi in rear right tire with hand held gauge. While operating the vehicle on the interstate, vehicle driver experience a flat tire in the right front passenger tire. Tire Pressure monitoring system indicated 41psi in right front tire (even while flat), and indicated right rear tire at 0psi even though it was visually inflated.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11474593July 18, 2022
ENGINE, VEHICLE SPEED CONTROL, POWER TRAIN
I have a 2018 GMC TERRAIN which I bought brand new from General Motors. In May 2022, the vehicle started jerking/hoping and trying to stall when the speed gets to 55 miles per hour or higher. I have taken it to the dealership on three different occasions for repair and I still have this issue. General Motors engineers were involved in every step of the repairs. They just do not know what is going on with the car or fix it and they are too stubborn. The dealership told me today that they cannot do anything else to the car. They also said they had a code from the engine last week and General Motors said they do not know what that code means. They are forcing me to accept/drive the car in this unsafe condition. I have contacted them multiple times and they do not care.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469176June 14, 2022
ELECTRICAL SYSTEM, LANE DEPARTURE: WARNING, EXTERIOR LIGHTING
Radio, hands free calling, and light on mirror shorting out. None of them work. It’s like it has a short in the wiring.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11467275June 3, 2022
SERVICE BRAKES
6/3/22 I went to the grocery store which is on a four lane road. When I left the store I had no brakes. On a four lane stop and go road. The was no warning just nothing peddle to the floor and now check engine light is on. I am reading this same problem repeatedly. I love this car but this is a serious hazard and needs to be addressed. We are all driving around practically rear ending people. I was an inch from the guy in front of me thank God the light changed as I was coming up on him or I would have hit him.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11466812May 31, 2022
SERVICE BRAKES
I was driving out of town (2 hrs from home) with my 2 small children and my mother, when I tried to slow to come to a stop my breaks did not work and I almost rear ended someone. It was sudden, there were no signs that my breaks were going to mess up. When I tried to look up recalls, there were none for my vehicle BUT there were MANY statements of people who drove gmc or gm vehicles that had the same issue with the vacuum boost for the brakes around 50k miles where the breaks just quit or were hard to use. It seems to be a common issue and is VERY unsafe. I cannot afford to fix the issue and I don't feel as though I should have to if other terrains have been recalled, except mine which I do not understand.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11463828May 9, 2022
AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT
Started car in parking lot. Warning came on saying “service safety restraint system” and airbag illumination was on. Just notified salesman as I have only had this vehicle about 10 days. Bought it used. Unfortunately.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11462545April 28, 2022
SEATS, VISIBILITY/WIPER
My driver seat does not raise or incline so it gives me like a visibility when I’m driving. The seat needs to be raised so I have more visibility on the road while I’m driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11462183April 26, 2022
POWER TRAIN
When you're sitting at idle in gear and go to accelerate the transmission will slip out of gear into neutral then into gear after the rpms climb. This happens alot. According to the dealership this is normal based on information from a bulletin from GMC.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11461463April 20, 2022
ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS
Unknown
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11460372April 11, 2022
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
1. 2018 Terrain would not start in a parking lot. Remote was used after several attempts to start with push button failed, and after a slight hesitation , engine started. Vehicle was driven about 6 miles without incident. 2. Vehicle was driven about 10 miles the next day and start/stop engaged at a stop light but would not restart. After about 3 minutes of cycling throught the starting procedure, the vehicle started. Drove another 8 miles without incident. 3. Next morning, drove about 3 miles to intersection where start/stop engaged but would not restart. After about 30 minutes of cycling through starting procedure and an attempt to jump start was made the vehicle restarted. At this point, the vehicle was taken to Romain GMC for service. A new battery was installed and other related operations.After about 10-15 miles, the vehicle would not start. Remote was attempted but it would not start. After about an hour, vehicle started and was driven back to Romain avoiding the stop/ start engagement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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