We've figured all along that the U.S.-spec version of the Chevrolet Colorado (which may have a different name) along with its GMC twin would differ from the global Colorado. Now, we're getting an indication of what those changes will likely be. While the global model has a swept-back, almost car-like nose, it appears that the U.S.-spec model will have a more upright grille -- though the headlamps have somewhat of a back-swept, tapered look, even taking into account the placeholder black-plastic sealed beam units used for testing. Overall, the front-end look appears similar to that of the current GMT-900 Chevrolet Tahoe SUV.

Details that appear to carry over from the global model are the six-lug wheels and up-swept rear window beltline found on extended-cab models. At this point, it's unknown whether the extended-cab version of the new midsizers will have a front or rear-hinged rear door. The 2014 Silverado extended cab adopted a conventional front-hinged door similar to Ram's Quad Cab.

Engines and powertrains have not been officially announced, but as we conjectured a few weeks ago, we believe the engine options will be a base 2.5-liter I-4, 3.6-liter V-6, and potentially the 2.8-liter Duramax turbodiesel I-4, all mated to a mandatory six-speed automatic. There is a possibility the U.S.-spec midsize trucks could get a manual transmission, but it may be limited only to the base four-cylinder model. The trucks may be shown at the Los Angeles Auto Show, or another venue earlier in the year. Production is expected to begin in the fourth quarter of 2013 or early calendar 2014.