ATTACK OF THE CLONES, IN HD

摘要

The sierra presents a quandary. Here is the Chevy Silverado's doppelganger-subtle differences mark the exterior, but you'd have to park the two next to each other to spot the changes-yet it's supposed to be a different truck, just because the badges say so. Can it stand on its own?With this question in mind, we invited the new Sierra HD to our contest, along with the Silverado HD. The copy-and-paste job is for better and for worse. Better, because the GMC is essentially the same vehicle we've dubbed the 2011 Truck of the Year (if you couldn't tell by now).The powertrain options come over unchanged: Shoppers can opt for either an OHV 6.0-liter V-8 with 360 horsepower and 380 pound-feet of torque or a 6.6-liter diesel with 765 pound-feet of twist and an exhaust brake that manages downhill speed without using the brakes.