Our '05 GMC Sierra is nearly identical to the Chevy Silverado but features more mature, restrained styling. It's a look that reflects GMC's history of building trucks, and only trucks, that dates back to 1902. We like it, and truck buyers do as well. , It offers first-class hauling and towing capabilities. Our Extended Cab, with a 143-inch wheelbase and Quadrasteer four-wheel steering and heavy-duty brakes, makes a supremely stable tow vehicle, with towing capacities up to 9,000 pounds.