GMC's 2011 Sierra 3500HD chassis cab trucks deliver greater capability, efficiency and refinement than the models they replace - including an increased gross vehicle weight rating of up to 13,200 pounds and a gross combined weight rating of up to 27,500 pounds on dual rear wheel models.
• Stronger independent front suspension with a front axle weight rating that increases up to 25%
• New for chassis cabs are 2WD single- and dual-rear-wheel regular cab models, while box-delete models are now offered in a crew cab configuration
• 36-gallon single tank on box-delete and up to 63.5-gallon combined dual-tank capacity on chassis cab models with the 6.6L Duramax
• New, more powerful 6.6L Duramax diesel that delivers 335 horsepower (249 kW) and 685 lb.-ft. of torque (928 Nm), with greater fuel economy, up to 63% lower emissions, B20 biodiesel capability and quicker acceleration