general problems of the 2012 GMC Terrain

1. The engine suddenly lost power while driving during evening rush hour and the vehicle would no longer accelerate. 2. Because the vehicle could not maintain speed, I was unable to keep up with traffic, creating a serious safety hazard that could have resulted in a major accident. 3. The vehicle has been inspected by an independent service center for diagnosis. 4. During the incident, the “engine power reduced” warning indicator illuminated just before the loss of power occurred. 5. As the vehicle slowed and came to a complete stop at an intersection, it remained unresponsive. When the traffic light turned green, the vehicle would not accelerate at all.

The check emissions light for the engine light came up on the dashboard. Without prior warning or other signs the vehicle lost engine power in the middle of the road. The entire electrical power and engine stopped working and the brakes jammed. This causes the vehicle to become unstoppable in the middle of the road causing a safety hazard to the vehicle, driver, passengers and fellow vehicles on the road. The only way to stop the vehicle is somehow use the gears to shift to parking position, turn the engine again on and try to remove the vehicle from the middle of the road.

When I stop at the light my car shake and rocks, then the car goes into limp mode. Where the stabilitrack comes on and the engine goes into reduced mode. And I can't go over 30mps. When this happened on the freeway is the most dangerous and scary feeling ever. I've got so many new parts and put over 3,000 into the car and it still has this issue. I've been do several different mechanics and nobody can figure out what's wrong. Gm needs to look into this, it's so many forums going on for this issue.

Over the past couple years I have become worried to even drive this vehicle. Well taken care of and maintenance completed regularly. This vehicle has been in the shop 7 times in the past couple years but no one can tell me exactly what is going on. Only 1 place has told me that I need extensive electrical work but couldn't tell me what exactly the problem was. Issue #1: when coming to a stop, and/or idle, the engine seems to give up and vehicle shuts off. Issue #2: when started engine sounds like a. High pitch raddle. Issue #3: occasionally, while driving on the interstate going around 60 - 65 mph the electrical inside the vehicle will flash and everything shuts off and the emergency brake is applied automatically. This has become dangerous - if I wasn't wearing a seatbelt I could have been thrown through the windshield. Issue #4: replace fuel cap sensor comes on even though it's been replaced. Issue #5: engine power reduced notification comes on even though it had a new battery and alternator. Issue #6: occasionally speakers sound blown and you can hear a buzzing as you accelerate. Issue #7: stabili track, abs, and tpms sensors all come on at once and go away at once atleast 4 times a week. Issue #7: rear cam doesn't always work, sometime either black or static looking. Issue #8: sometimes key sticks in ignitiin and will not turn on unless being jumped by another vehicle. Issue #9: often upon starting the whole dash goes black and will stay that way for several hours then comes back on. I've checked all fuses and multiple mechanics can't figure it out. As time goes by without repair I'm scared to even drive this vehicle. Why can't someone figure this out!!.

During a bad storm the windshield wipers went past the windshield and the motor froze up motor started humming then locked up.

The defroster will not switch air flow to vent. This causes the entire car to fog up constantly especially the windshield during rain or humid weather. This obstructs view and creates a life threatening hazard. This happens while driving constantly on highway I side street.

My vehicle has excessive oil consumption including the need for frequent oil refilling, combined with audible rattle and knocking sound.

Recent problems with my 2012 GMC Terrain all-wheel-drive pvc valve caused rear main seal to consume oil and gasket blew out drivers seat will not move forward or backwards visor on drivers side will not stay up also electrical problems.

Vehicle shuts off when slowing to a stop and have to restart in order to accelerate. That was looked at and �fixed� and now the vehicle shakes when slowing down and headlights dim as if it is trying not to shut off. Engine is very rough and rattles while starting to accelerate and accelerating. When brakes are pushed the car starts to turn off while in motion. When stopped, car shakes and there is a very hard knocking coming from the engine.

Stationary sensor lights come on steering monitoring warning also reduced engine power then doesn't come on after turning off and it doesn't turn off like it should it is like the engine begins choking.

Takata recall my car has been throwing a engine power reduced and service stabil trak light. I have had it in the shop five times now, after replacing a coolant sensor which is a code it through, it has thrown three pedal sensors, after replacing it the first time the mechanic place told me the pedal was bad, sent it back replaced it again and the light came back on. This has been going on since the beginning of may and still not resolved. I have read several other people post about this on their Terrains.

In may 2018 my rear camera and backup lights stopped working. When I went to the dealer, the dealer tol me that the rear camera was bad and it was tied to the back up lights. They would not fix it for free. I was charged $175 dollars to disconnect the camera. The camera should be linked to the backup lights when it malfunctions. I almost hit a person because the backup lights would not turn on this is a serious defect. Sunrise chevy should not have charged me for this problem.

The display screen of gps/radio is blackout combined intermittent control button illuminating light went off( include emergency, a/c control), backup camera stopped working, turning signal lost click sound. Safety concern: 1. Emergency and a/c control buttons lost illuminating light(causing night driving difficult. ). 2. Ac vent the temperature control lost visual status cause distraction of normal driving. 3. Lost backup camera function which is supposed to be an assisted safety feature. 4. Lost turning signal click sound which leads to missing alert of turning signal malfunction. 5. Complete audio loss create unsafe for long trip driving. 6. Gm doesn't provide genuine replacement part. This problem started from 2018 till now. I've contacted gm with no meaningful resolution. I visited the dealer and the only thing they could do is replace non guaranteed refurbished head unit with hefty price. I did some research online and found there are a lot of same problems happened to this vehicle and similar models of gm. After driving this vehicle for several years without incurring any accident, I realized that the losses of the some vital control functions and safety alert are actually very serious concerns and should be addressed and resolved by gm.

While driving the vehicle, I experienced strong knocking vibrations and sounds seemingly coming through the floorboard. As I continued driving for about 5 miles trying to get home, the knocking became more pronounced and my steering was affected. I also began noticing an extremely strong odor necessitating lowering windows to breathe. I notified my dealership and took the vehicle in for diagnosis the very next morning without driving it after arriving to my garage. I was told the awd had completely deteriorated. My concern was that I never received any dashboard notification of the problem, not did my onstar diagnosis indicate a problem. I have been quite disturbed that the vehicle became disabled before I was aware of any problem. I have taken my vehicle in for regular maintenance at my GMC dealership and would like an explanation regarding the failure to identify this problem through the regular maintenance checks. I am single senior woman who has no backup vehicle and am quite concerned about my safety on the highway and this issue has caused me to have serious safety concerns. I drove the car to the dealership to check on the problem on Friday, February 16, 2018. I called the GMC complaint center to check on possible recalls or any remaining warranties that might apply and I was told the center was assigning a sr. Advisor to contact the local GMC dealership that still has my car and the advisor was told the dealership needed more time to diagnose and assess the cause of the problem. I have had to rent a vehicle since it may be another 2-3 days before I even get a response regarding the nature and cost of the repairs. I was originally told the entire awd system had to be replaced at a cost of $1500--$2000. I questioned the reason for the extreme malfunction without any warning notices appearing. . . Main reason for my complaint and concern.

Vehicle check engine light came on at 50,000 miles, would not pass inspection. Computer did not show what problem was. Car would cut off in drive in idle. Car would shake. Mechanics put in new parts and battery for more than $1200. Still was not fixed. Mechanic went to a dealership to inquire if they had seen this problem. At the dealership it was discovered that many of the parts that would cause the problem were on recall. Gm had not posted these recalls or notified me, the owner. After inspecting the car they said there was too much wrong to repair and the entire engine would need to be replaced. They said I would need to drive 2000 miles to check oil consumption. They never made us aware there may be problem with the oil consumption. I am 68 yrs old and walk with a walker. I am in the hospital often. The mechanics said they would drive the car as much as they thought necessary to determine oil consumption. While driving the vehicle in charlotte nc the car started smoking and caught fire. The driver forced his way out but had that been me, I probably would have died due to my handicap. I have now been without a vehicle for over a month. I have contacted gm but they are slow for any resolution. I asked for a loaner vehicle but was told they couldn't do that now.

I have had this car for less than a year, bought from a dealer, and I have checked the background to which there have not been any type of accident or damage from what was provided to me. It randomly started shaking uncontrollably and shutting off while I was driving. Now mind you, as a pregnant woman driving on the highway, this is not safe. My engine light turned on. Though I could have gotten in an accident, by the grace of god people moved out the way and allowed me to get off and to the side.

The contact owns a 2012 GMC Terrain. The contact stated that the air conditioning was not working and leaked inside the vehicle on both sides during the summer months. The contact also stated that the heater did not work in the winter. The vehicle was diagnosed by an independent mechanic who could not determine the nature of the failure. The manufacturer was not notified. The vehicle was not repaired. The approximate failure mileage was 27,000.

The contact owns a 2012 GMC Terrain. While driving at approximately 25 mph, the traction control and the stability trac warning lights illuminated and the vehicle stalled. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 68,000.

On various occasions when slowing down or turning, the engine will die. Front end accident going 55+ mph on a country road, hit a very large dip, airbags did not deploy, seat belts did lock up.

GMC refuses to help. I am contacting becasue I own a 2012 GMC terrian and we just started having issues with out radio where it will turn on even with the car off. Our GMC dealer said that they have seen this issue alot and since my vehicle just came out of warrenty in Feb. It will cost us $150. What can we do since this is a fault in the radio flashing not something we have done. If the radio turns on while the car is off what else will start doing that.

Won't start, get a "check power steering"light.

Tl-the contact owns a 2012 GMC Terrain. The contact stated that while driving at 10 mph, the tpms warning light for the front driver's side and at a later date the front passenger's side illuminated. The failure recurred on numerous occasions. The vehicle was taken to a dealer who stated that an adjustment needed to be made. The contact was unsure about what adjustment the dealer performed. However, the failure persisted. The manufacturer was not notified of the failure. The failure mileage was 10,000. Oo.