Transmission Not Go Into Gear problems of the 2016 GMC Terrain

2016 GMC Terrain will show the check engine, traction control and service stabilitrak lights after gauges jump up and down. Vehicle will then go into neutral and then suddenly slam into 2nd gear. This occurs at high rates of speed on the interstate, as well as, normal roads. The vehicle will then stay in 2nd gear and will not go into another gear when it is placed in manual either. Sometimes, after restarting several times, it will drive normally. Other times, it will not start once it is turned off. I have had it to the garage five times in the last month. The starter wire and starter relay have been replaced, loose ground wire tightened, and the ecm replaced yet the car continues to repeat the same cycle. Car currently has 53,300 miles on it.

The contact owns a 2016 GMC Terrain. The contact stated that while driving at unknown speeds, the transmission shifted into neutral independently and failed to change gears. The contact mentioned that the vehicle would not accelerate. The failure recurred several times. The vehicle was towed to the dealer. The technician was unable to duplicate the failure. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 50.