2018 GMC Sierra 2500HD Denali – 6.6L Duramax Turbo-Diesel V8 6.6L Duramax Turbo-Diesel V8 Allison 1000 6-Speed Automatic Crew Cab Denali Configuration Jet Black Leather Interior Built for serious capability. Key Highlights Duramax Plus Package Power Sunroof Denali Preferred Equipment Group Gooseneck / 5th Wheel Prep Package Off-Road Suspension Package Chrome Power Adjustable Trailering Mirrors with Memory Rear Underseat Composite Storage High Idle Switch & Exhaust Brake The Experience The Duramax diesel paired with the Allison transmission delivers strong, consistent power with smooth shifting under load. Whether towing or cruising, the truck maintains composure with a confident, planted feel. Inside, the Denali trim presents a refined, quiet cabin with premium materials throughout. The layout is clean and functional, with intuitive access to key controls and technology designed for everyday usability. This Sierra 2500HD combines heavy-duty performance with upscale execution, creating a well-balanced truck built for both demanding work and comfortable driving. Factory Installed Packages & Options Duramax Plus Package — $9,940 Power Sunroof — $995 Other Factory Options Suspension Package, Off Road Rear Axle, 3.73 Ratio Gooseneck / 5th Wheel Prep Package Engine Block Heater Switch, High Idle Chrome Recovery Hooks Smoked Amber Roof Marker Lamps Chrome Heated Power Adjustable Trailering Mirrors with Memory Rear Underseat Storage Front License Plate Kit Performance & Capability Four-Wheel Drive System Heavy-Duty Locking Rear Differential Integrated Trailer Brake Controller Trailer Hitch Platform Hill Descent Control High-Capacity Air Cleaner Interior & Comfort Perforated Leather Seating Heated Front Bucket Seats Dual-Zone Automatic Climate Control Power Adjustable Pedals Driver Memory Settings Heated Leather-Wrapped Steering Wheel Technology & Connectivity GMC Infotainment System with Navigation Apple CarPlay & Android Auto Capability Bluetooth Audio Streaming Bose Premium Sound System 4G LTE Wi-Fi Hotspot Exterior & Utility Spray-On Bedliner EZ-Lift Tailgate LED Cargo Box Lighting HID Projector Headlamps 20" Chrome Aluminum Wheels Safety & Driver Assistance Forward Collision Alert Lane Departure Warning Front & Rear Park Assist Rear Vision Camera with Guidelines Stability Control with Trailer Sway Control Tire Pressure Monitoring System Why This Spec Matters A Duramax diesel Denali with the right factory packages offers a strong balance of towing performance, long-term durability, and premium interior refinement—making it one of the most desirable heavy-duty truck configurations available. Strong diesel performance. Well-equipped Denali build. Ready for demanding use. Services done by TX Auto Group Service: Vehicle Inspected, Oil & Filter Changed, all fluids checked & topped off if needed. You can always find 50+ high quality photos and a detailed walk around video of each vehicle on our website. The video is conveniently located above the vehicle’s profile image for easy viewing. At TX Auto Group, we are committed to delivering a superior level of customer service in the automotive industry. With years of experience in vehicle sourcing, buying, and selling, our team carefully selects high-quality vehicles from trusted partners. Why choose TX Auto Group for your next vehicle? Transparent, no-haggle pricing Competitive financing solutions Multiple extended warranty options at affordable rates Verified 5-star reviews from satisfied customers We also provide: Complimentary CARFAX Vehicle History Reports Nationwide shipping Airport pickup service And more! For questions or inquiries, feel free to contact us directly at 832-582-7785. We look forward to earning your business!