Here Come the new 2011 Sierra Heavy Duties GMC engineers never stop exceeding expectations. This philosophy holds true with the new Sierra Heavy Duty (HD) lineup – a big-time example of engineering excellence with no compromise. ALL-NEW CHASSIS AND FRAME THAT DELIVER OUTSTANDING CAPABILITY AND RIDE Sierra HD has been reengineered from the ground up to provide excellent trailering and payload – one of the top reasons customers seek out heavy-duty trucks. In fact, Sierra HD provides segment-leading payload in the most popular HD model: the 4×4 3/4-ton Crew Cab (see page 4.) SEGMENT-LEADING POWER WITH A NEW DURAMAX® DIESEL ENGINE AND ALLISON® TRANSMISSION This powertrain combination has a proven track record with nearly 1.3 million sold in the last decade. Here’s to millions more – GMC has made it quieter and more powerful than before. Additionally it is now B20 biodiesel compatible. Under the hood, 397 hp and 765 lb.-ft. of torque make the new Duramax the most powerful diesel in the segment. NEW CONTROL FEATURES FOR CONFIDENCE WITH HEAVY LOADS The ultimate workhorse truck provides the utmost confidence to manage the heaviest of loads. The new Sierra HD lineup has it all covered with an array of control features. BEST WARRANTY IN THE SEGMENT No one can match the GMC powertrain limited warranty – plus you get courtesy transportation and roadside assistance. AN EXCLUSIVE DENALI HD MODEL GMC is extending its exclusive Denali line to the Sierra Heavy Duty lineup – a first-time HD offering of Denali’s unique combination of distinctive style, premium features and capability.