One problem related to transmission solenoid has been reported for the 2011 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 GMC Terrain based on all problems reported for the 2011 Terrain.
Airbag light came on at 125k miles. Known problem on this year/make/model is airbag sensor on passenger side. 90k miles timing chain replaced. 154k miles timing chain broke 3 qrts of oil needed every 2k miles 154k miles transmission leaking fluid 100k miles catalytic converter needed replaced 125k miles downstream air sensor needed replaced 150k miles upstream air sensor needed replaced solenoids need replaced every 50k miles.