Maybe the crew-cab models of the new Chevy truck (and its near-clone GMC Sierra) finally will get back seats as roomy, comfy and easy to use as the ones in the Toyota Tundra, Ford F-150 and Ram 1500.

Of course, there is more to the concept than a throwback camo scheme -- appropriate here because the Silverado is now the size of a small ship; this 1500 Z71 features a number of heavy-duty ...