The GMC Sierra 3500 HD embodies power, durability, and versatility. As a heavy-duty truck designed to excel in the most demanding tasks, it offers a blend of exceptional towing capability, advanced technology, and premium comfort. At SouthWest GMC in Lawton, OK, we take pride in showcasing this powerful workhorse that meets the needs of professionals and adventure-seekers alike.
Bold Design with Practical Enhancements
The Sierra 3500 HD combines rugged strength with functional design elements:
- Durable Exterior: Built with high-strength steel and bold, sculpted lines for a commanding road presence.
- Multipro Tailgate: A versatile feature that offers six unique configurations for improved functionality.
- LED Lighting: Includes headlamps, fog lamps, and taillights for enhanced visibility and a modern aesthetic.
- Distinctive Grille Options: Choose from a variety of trims, each offering unique grille designs to suit your style.

Unmatched Towing and Payload Capability
Engineered for heavy-duty performance, the Sierra 3500 HD handles even the toughest jobs with ease:
- Max Towing Capacity: When equipped with the available Duramax® 6.6L Turbo-Diesel V8, it can tow up to an impressive 36,000 pounds.
- Payload Capability: With a reinforced frame and advanced suspension, it supports payloads up to 7,442 pounds.
- Enhanced Trailering Technology: Features like Trailer Sway Control, an in-vehicle trailering app, and up to 15 camera views make towing safer and easier.
- Dual-Rear-Wheel Option: Provides added stability for maximum towing confidence.
Advanced Powertrain Options
The Sierra 3500 HD offers robust engine options tailored to deliver performance and efficiency:
- 6.6L Gas V8 Engine: A powerful standard engine with a smooth 6-speed automatic transmission.
- Duramax® Diesel Engine: Offers a 10-speed Allison® automatic transmission for optimal power delivery and control.
- Four-Wheel Drive Capability: Available on all trims to tackle challenging terrains with confidence.
Innovative Technology for Seamless Connectivity
The Sierra 3500 HD is equipped with cutting-edge technology to enhance every drive:
- Infotainment System: Features a touchscreen with Apple CarPlay® and Android Auto™ compatibility for hands-free connectivity.
- Heads-Up Display: Projects key information like speed and navigation directly onto the windshield.
- Safety Suite: Includes features like Forward Collision Alert, Lane Departure Warning, and Automatic Emergency Braking.
- Wi-Fi Hotspot: Keeps you connected, whether on the job site or during long road trips.
Interior Comfort Meets Utility
Inside the Sierra 3500 HD, luxury meets practicality:
- Premium Materials: Trims like Denali offer perforated leather seating, wood accents, and a heated steering wheel.
- Spacious Cabin: Crew Cab configurations provide ample legroom and storage for passengers and cargo.
- Quiet Ride: Acoustic insulation and advanced suspension reduce road noise for a serene driving experience.
- Heated and Ventilated Seats: Ensures comfort in any weather.
Why the GMC Sierra 3500 HD is the Ultimate Heavy-Duty Truck
For drivers seeking unparalleled strength, advanced features, and luxury, the GMC Sierra 3500 HD stands out as a class leader. Whether you’re hauling equipment or towing a camper, this truck delivers the performance and comfort you need. Explore its capabilities at SouthWest GMC in Lawton, OK, and experience professional-grade engineering firsthand.

