General Motors has been testing several of the vehicles on its upcoming full-size platform. We recently saw two prototypes for GMC's all-new Yukon XL in the blazing desert heat. Any concerns that these behemoths would show signs of downsizing in these increasingly fuel-conscious times were immediately dashed on first glimpse. The Yukon XL and its Suburban counterpart at Chevrolet should easily haul just as much stuff as the outgoing models. If the rumored weight savings on GM's new, full-size trucks actually match up to reality, their sport/ute spinoffs, like the one pictured here, should also reap similar benefits.

Sorry Folks, we can't show you the full images at the moment but you can see it in our upcoming November/December 2012 issue, set to hit news stands on September 25, 2012.