2011 Chevrolet Silverado 2500HD LTZ Duramax 6.6L Diesel Turbo V8 (397 hp / 765 lb-ft) The 2011 Silverado 2500HD LTZ is the premium heavy-duty trim in the Silverado HD lineup, engineered for serious towing and hauling while offering a well-appointed interior. Powered by the Duramax 6.6L turbocharged diesel V8 rated at 397 horsepower and 765 lb-ft of torque, this truck combines strong low-end torque with an Allison heavy-duty automatic transmission for confident performance under load. The Duramax diesel includes factory exhaust-aftertreatment components required for emissions control, including the diesel exhaust fluid (DEF) system. Mechanical and powertrain - Duramax 6.6L turbocharged V8 diesel: 397 hp and 765 lb-ft peak torque. - Allison heavy-duty automatic transmission (6-speed), calibrated for heavy towing. - Heavy-duty chassis components and cooling system to support sustained towing and payload. - Available in two-wheel drive (2WD) and four-wheel drive (4WD) configurations. - Factory-installed trailer-ready features (common on HD models), including a factory hitch receiver and wiring provisions; higher-capacity rear axle and brakes appropriate to the HD class. Exterior - LTZ trim styling with bright chrome grille and bumper accents and premium exterior trim. - Integrated steps, tow hooks (on some configurations), and fog lamps for improved visibility and utility. - Power exterior mirrors designed for towing; mirrors are typically heated with power adjustment. - Tailgate and bed designed for heavy use; bed options and liners were available from the factory. Interior and comfort - Leather-appointed seating surfaces and higher-grade trim materials befitting the LTZ designation. - Power-adjustable driver (and typically front passenger) seats; heated front seats commonly included. - Large center console for storage and organizational convenience. - Power windows and door locks, remote keyless entry, and cruise control as standard convenience features. - Tilt steering and steering-wheel mounted controls for audio and cruise functions. Climate and convenience - Air conditioning and HVAC controls suitable for heavy-duty interior comfort; LTZ often featured upgraded climate control components. - Multiple 12V accessory outlets and a standard auxiliary audio input; OnStar and hands-free phone capability were available or included depending on factory options. Infotainment and electronics - AM/FM stereo with CD and auxiliary input; higher-level audio options and satellite radio were frequently offered as factory options. - Instrumentation and driver information center providing engine, vehicle and towing data. Safety and driver assistance - Full complement of airbags (front and side curtain airbags) and front seat side-impact protection. - Antilock braking system (ABS), traction control and electronic stability control to help manage heavy loads and slippery conditions. - Tire pressure monitoring system (TPMS) and heavy-duty braking components appropriate for an HD pickup. Wheels and tires - Bright/chrome or polished alloy wheels were standard for the LTZ appearance; tire size and exact wheel design varied by package. Notes Factory equipment could vary depending on the original options and packages ordered at purchase. The LTZ combines the Silverado HD's commercial capability with upgraded comfort and trim for an exact factory feature set on a specific truck, review the original window sticker or option code list.