2011 GMC Sierra 3500HD

The 2011 GMC Sierra 3500HD Denali pairs heavy-duty capability with luxury-trim appointments. Under the hood it is powered by the Duramax 6.6L Turbo V8 diesel rated at 397 hp and 765 lb-ft of torque, factory-mated to an Allison 6-speed automatic transmission and a heavy-duty drivetrain and chassis designed for commercial-grade towing and hauling.

Key factory features and appointments

Powertrain & chassis
- Duramax 6.6L Turbo Diesel V8 (397 hp / 765 lb-ft) with Allison 6-speed automatic transmission.
- Heavy-duty frame, suspension and brakes engineered for 3500HD gross vehicle and trailer loads; rear multi-leaf springs with heavy-duty shocks.
- Electronic traction control and StabiliTrak stability control systems.
- Heavy-duty cooling, alternator and electrical systems to support towing accessories.
- Available in single- or dual-rear-wheel configurations and in two- or four-wheel drive drivetrains.

Towing and utility
- HD tow provisions from the factory, including robust hitch mounting points and wiring for trailer connections.
- Integrated trailer brake control and trailer sway mitigation are factory-engineered into the vehicle’s control systems (equipment and exact configuration may vary by factory package).
- Reinforced bed and tailgate area, factory lighting, and bed tie-downs for secure cargo transport.

Exterior
- Denali-specific styling with signature chrome grille and premium exterior trim.
- Chrome bumpers and trim accents, fog lamps, and heavy-duty tow hooks (where equipped).
- Power-adjustable, heated towing mirrors designed to improve visibility when trailering.

Interior and comfort
- Denali luxury appointments including leather-trimmed seating surfaces and premium materials throughout the cabin.
- Power-adjustable front seats with available heating (Denali normally includes heated front seating as part of the luxury package).
- Large center console and significant storage and cupholders appropriate for work and long-distance driving.
- Dual-zone automatic climate control and convenient accessory power outlets.

Technology and convenience
- Premium audio system (Bose-branded on Denali models) and a factory infotainment radio with CD, auxiliary inputs and available satellite radio.
- Steering-wheel mounted audio and cruise controls for driver convenience.
- OnStar telematics and hands-free calling capability are factory-integrated (trial service typically included).
- Factory options and packages could add navigation, rear-vision camera features and other convenience items.

Safety
- Four-wheel anti-lock disc brakes, front and side-impact airbags, head curtain protection and active stability/traction control systems.
- Tire pressure monitoring and robust occupant protection designed to meet contemporary safety standards.

The Denali trim is intended to combine the Sierra 3500HD’s rugged diesel capability with upgraded materials, convenience and sound insulation. Exact standard items and installed factory options can vary by production configuration; consult the vehicle’s original build sheet or window sticker for a complete list of factory-installed equipment.