The Silverado 2500HD Z71 is a heavy-duty variant of the T1XX-generation Silverado fitted with the Z71 off-road package, which adds a specialized suspension tune, skid plates, and all-terrain tires to the 2500HD platform. Power comes from either a 6.6-liter V8 gasoline engine or the 6.6-liter Duramax turbodiesel, the latter producing around 445 horsepower and 910 lb-ft of torque. The combination of heavy-duty towing capacity and off-road hardware makes the 2500HD Z71 a distinct option within the Silverado lineup for buyers who require both work capability and unpaved-road credibility.