They can range in size from tiny, like the new Jeep Compass, to Texas-sized, like the coming GMC Acadia and Saturn Outlook.

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The center-mounted seatbelt will be standard on all Buick Enclave models and will be included on GMC Acadia and Chevrolet Traverse versions equipped with power seats.

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The Outlook is a version of GM's full-size crossover family that includes the GMC Acadia, Buick Enclave, and Chevrolet Traverse, while the Sky is a rebodied Pontiac Solstice.

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Moving seven passengers with greater efficiency leads to the consideration of lesser (and smaller) vehicles, like the GMC Acadia Denali, or a minivan like the Toyota Sienna or Honda Odyssey.

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The reason, according to Global Insight's Lindland: People can switch from midsized, truck-based SUVs like the Ford Explorer, Chevrolet Trailblazer, Toyota 4Runner and Nissan Pathfinder into lighter, more fuel efficient so-called crossover vehicles like the Honda Pilot, Toyota Highlander and forthcoming GMC Acadia without losing much utility.

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The reason, according to Global Insight's Lindland: People can switch from midsized, truck-based SUVs like the Ford Explorer, Chevrolet Trailblazer, Toyota 4Runner and Nissan Pathfinder into lighter, more fuel efficient so-called crossover vehicles like the Honda (nyse: HMC - news - people ) Pilot, Toyota Highlander and forthcoming GMC Acadia without losing much utility.

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This strong branding combined with popular products like the GMC Terrain, Acadia and Sierra have helped propel GMC sales.

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GM's all-new full-sized pickups will hit dealer lots early next year, along with a pair of large crossover SUVs for GMC and Saturn, called Acadia and Outlook.

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