Front seat passengers will like the wide-open feel of the cockpit and comfortable, mildly bolstered seats. Rear-seat legroom is surprisingly good despite the Terrain's compact dimensions, thanks to a sliding bench arrangement. The slider also allows for more cargo room in the rear when desired, and the folding seats open up for a maximum capacity of 63.9 cubic feet. With the seats up, cargo capacity is still good at 31.6 cubic feet. That said, the cargo floor is just a little high compared to rival vehicles, and the back seats don't fold to a completely flat cargo floor.
All Terrains also come with an oversized glove box, a covered storage binnacle above the center stack, a laptop-sized center armrest storage bin, and two-tier storage within the doors. The standard MultiFlex sliding rear seat can be moved up or back nearly eight inches, and the rear cargo area behind it offers up 31.6 cubic feet of storage (presumably with the seat fully forward).
Whether you choose durable fabric or the quality-feeling leather, interior build quality and comfort is not an area for complaint in the 2011 GMC Terrain, but some trim pieces disappoint with a hollow, hard plastic feel; the release for the bin at the top of the instrument panel, a thin piece of chromed plastic, feels especially brittle.
Unique to the four-cylinder is a special active noise cancellation system that works through both the built-in audio system and a few dedicated speakers to allow the engine to run at its most efficient RPM range. It also prevents what engineers call a "booming" resonance in the cabin that would otherwise occur.