Serious issues with the GMC Terrain include transmission breakdowns, cracked exhaust manifolds, and engine failures. Engine failures caused by excessive oil consumption are frequent at about 92,000 miles. In this article, we discuss the most common and uncommon 2011 GMC Terrain problems for your knowledge, and you can also use this article as a buyer’s guide. So, stick around until the end to find out what you’ve been looking for. What to know about the…