One problem related to transmission not engage has been reported for the 2014 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 GMC Sierra 1500 based on all problems reported for the 2014 Sierra 1500.
I was driving down the road and all of the sudden it was if my transmission disengaged and my car lost power. It then automatically came back on and the �service stabilitrak� lights came on. I nearly avoided an accident and was able to pull off onto the side of the road.