For the debate for many people out there debating wither to purchase an inline 4 GMC Terrain or the SLT2 V6. I personally find the inline4 to be enough but if you have a family, with a boat or a trailer to tow i would say go for that v6.
In any case here is autoblog's intense overview of the two motor's.
Nice to actually see what the difference between the two is other than the hp ratings. Sadly I'm very biased towards the V6. Although the inline 4 is an ok option if I'm looking for something more fuel efficient.
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