Two problems related to car will not start have been reported for the 2012 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 GMC Terrain based on all problems reported for the 2012 Terrain.
Took my 2012 Terrain in for the excessive oil burn in may 2017. Several times before the car would not start. I was told by dealer it was due to the oil being low due to burn within 1000 miles of change. About a month after getting it back it started randomly not starting. I first thought it was that I left the dome lights on. Then it would happen when I used my back gate, then randomly after opening any door but the drivers when the car was not on. Everything was working but the car wouldn't start. It was all random. Check engine light came on and it read gas cap, so I changed that as I was told that could cause the car not to start. It didn't help and it resumed not starting within days. So I have been starting car to open any other doors and reduced to no dome lights at night. Last night, it wouldn't' start after simply backing my car into a different spot in my driveway. I had it jumped and then the cent console was completely blacked out. I could change the stations and change the heat but no lights. Got back home after driving it to charge battery and the radio wouldn't shut off even after removing key and locking. I tried both fobs, and it wouldn't shut down. I shut the radio off, and then it seemed to have worked because the security light came on and I didn't see any lights inside. This morning the car was dead. More than usual, I couldn't even unlock it except with key. I tried to start, no click and then it locked my keys into the ignition. We jumped it and I drove it straight to the dealer. I have to drive for my job and right now I am scared something it going to stop working like the lights or engine and I will be hurt or killed or hurt someone else. Very scary.
Tl- the contact owns a 2012 GMC Terrain. The contact stated that after inserting the key into the ignition switch the switch would not turn and the vehicle could not be started. The contact also indicated that the key became stuck in the ignition switch. After removing the key from the ignition switch the vehicle was towed to the dealer who replaced the ignition key but within days of retrieving the vehicle the failure had reoccurred. No further information was available. The manufacturer was not notified. The failure mileage was 41,000. Jft.