4 of 6
2008 GMC Sierra
October sales: 21,109
U.S. market share: 2.71%

Now that it's been identified as one of GM's core brands, expect to see more GMC products hitting the market. A new crossover SUV, smaller than the big three-row Acadia, is expected soon.

To some observers, GMC might seem like a largely pointless repetition of the Chevrolet truck line. But it's actually a highly profitable way to get more sales out of those products while giving Pontiac-Buick-GMC dealers trucks to offer.

"It's low-cost and high-margin, and it's offering something that has a clear position," said J.D. Power's Tom Libby. "Basically it's an upscale truck."

While GMC has stretched a bit into car-based crossover vehicles, customers still accept those as "trucks." It remains to be seen how far that can go.

NEXT: Saturn

Last updated December 03 2008: 1:00 PM ET
Source: Sales reported by GM, market share by J.D. Power and Assoc.
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