Chuck Nash Auto Group

Want to know how tough the GMC Sierra 3500HD really is? So did PickupTrucks.com.

Available for a test run at Chuck Nash Auto Group at 3209 North Interstate 35 in San Marcos, TX, the updated Sierra with diesel and dual-rear wheel power beat a slew of other rigs in this macho competition. PickupTrucks.com sent each vehicle up 2,200 miles of high-grade inclines, descents and through oppressive heat while towing 19,400 pounds in a trailer.

"When GMC says their trucks are Professional Grade they absolutely mean it," Ted Nichols, general manager of a New Hampshire GMC dealership…

Unlike many people, Chevy isn't embarrassed, or even bashful, about telling their age. Rather they've been talking about their 100-year anniversary practically since the calendar turned over to January 2011. And, festivities celebrating the company's century of success have been popping up periodically ever since.

The American automaker's most recent effort to commemorate the company's 100-year history was a parade down Woodward Avenue in Detroit, MI. To kick things off a troupe of classic Chevy models revved their engines in nearly deafening unison. Adding volume to the sentiment was an almost equally deafening silence. For joining the vintage Dream Cruise in Chevy's 100-year celebratory parade were nearly 50 ultra-quiet Chevrolet Volt electric vehicles (EVs) and handful of prospective and forthcoming  models, such as the new Chevy Camaro ZL1 and 2012 Chevy Sonic.