2025
GMC SIERRA 3500HD DENALI 4X4 CREW CAB 6.75 FT. BOX SRW

The 2025 GMC Sierra 3500HD Denali with the 6.6L Duramax Turbo-Diesel V8 engine exemplifies the fusion of heavy-duty performance and upscale luxury. Here's a comprehensive overview:​

Powertrain & Performance

• Engine: 6.6L Duramax Turbo-Diesel V8

  • Horsepower: 470 hp @ 2,800 rpm

  • Torque: 975 lb-ft @ 1,600 rpm

  • Transmission: Allison® 10-speed automatic

• Towing Capacity:

  • Maximum Conventional Towing: Up to 20,000 lbs

  • Maximum Gooseneck/Fifth-Wheel Towing: Up to 30,800 lbs

• Payload Capacity: Up to 4,127 lbs

Interior Comfort & Features

• Seating: 12-way power-adjustable front seats with heating and ventilation, as well as a heated steering wheel and heated rear outboard seats

• Materials: Denali-exclusive authentic open-pore wood and forged perforated leather seating surfaces

• Infotainment:

  • 13.4" diagonal center touchscreen

  • 12.3" diagonal digital Driver Information Center

  • Wireless Apple CarPlay and Android Auto compatibility

• Audio System: Available Bose Premium Series with Centerpoint surround sound​

Safety & Driver Assistance

• Standard Safety Features:

  • Forward Collision Alert

  • Lane Departure Warning

  • Front Pedestrian Braking

  • IntelliBeam auto high beams

  • Adaptive Cruise Control

  • Rear Cross Traffic Alert

  • Up to 14 available camera views, including HD Surround Vision​

Exterior Highlights

• Wheels: 20" Ultra-Bright machined aluminum wheels with bright chrome inserts

• Lighting: LED projector headlamps with animated sequences

• Tailgate: MultiPro Tailgate with six convenient functions

• Bed Protection: Spray-on bedliner with GMC logo​

The 2025 GMC Sierra 3500HD Denali with the 6.6L Duramax Turbo-Diesel V8 engine offers a harmonious blend of robust performance, cutting-edge technology, and luxurious comfort, making it a standout choice in the heavy-duty truck segment.