The 2018 GMC Sierra 2500HD Denali in Quicksilver Metallic with Jet Black interior delivers heavy-duty Duramax diesel power, premium Denali refinement, and 4WD capability for drivers who want serious truck strength without giving up first-class comfort. Powered by a Duramax 6.6L V8 Turbodiesel engine and paired with an Allison 1000 6-speed automatic transmission, this Sierra 2500HD Denali brings massive torque, confident towing performance, and smooth power delivery in a truck built to handle real work while still looking every bit the high-end pickup it is. With 116,004 miles, this Denali still offers strong value, upscale presence, and the kind of broad heavy-duty appeal that keeps a well-equipped diesel truck in demand.

Entertainment and Connectivity Features
• Touchscreen infotainment display
• Apple CarPlay integration capability
• Android Auto integration capability
• Bluetooth® hands-free connectivity
• USB charging and media ports
• Steering wheel mounted audio and phone controls
• Voice recognition capability
• Premium audio system capability
• Navigation capability
• Digital driver information display

Added Features
• Denali premium trim package
• Quicksilver Metallic exterior
• Jet Black interior
• 4WD capability
• Duramax 6.6L V8 Turbodiesel performance
• Crew Cab configuration
• Premium leather-appointed seating
• Heated and ventilated front seats
• Power-adjustable front seats with memory settings
• Chrome Denali-specific exterior accents
• Strong towing and hauling appeal
• Bold heavy-duty luxury truck presence

Safety Features
• Rear vision camera
• Front and rear park assist capability
• Electronic Stability Control
• Anti-lock braking system
• Advanced airbag system
• Tire pressure monitoring system
• Traction control system
• Hill start assist capability
• Trailer sway control
• Child safety locks

Standard Features
• LED signature lighting capability
• Premium alloy wheels
• Dual-zone automatic climate control
• Power windows and door locks
• Remote start capability
• Spacious Crew Cab interior
• Rear seat air vents
• Power-folding side mirrors
• Premium interior trim and accents
• Denali-specific styling details

Mechanical Features
• Duramax 6.6L V8 Turbodiesel engine
• Allison 1000 6-speed automatic transmission
• Four-wheel drive
• Heavy-duty suspension system
• Four-wheel disc brakes capability
• Electric power steering
• Integrated towing capability
• Strong diesel torque for towing and hauling
• Built for heavy-duty work, travel, and demanding use
• Smooth long-haul diesel performance

Why drivers choose Port Lavaca Auto Group for their next vehicle

• Trusted dealership serving Texas drivers with transparent, pressure-free buying experiences
• Large selection of quality SUVs, trucks, and cars ready for immediate delivery
• Knowledgeable product specialists who help match drivers with the right vehicle
• Flexible financing options for a wide range of buyers
• Ongoing customer support and service after the sale
• Strong reputation backed by consistent five-star Google reviews

Customer Review Highlight

We shopped around quite a bit before buying, and Port Lavaca Auto Group stood out right away. They were professional, easy to talk to, and made sure everything was clear from start to finish.
Heather W., March 2026

From its proven Duramax diesel power and 4WD capability to its premium Denali trim and roomy Crew Cab comfort, the 2018 GMC Sierra 2500HD is built for drivers who want heavy-duty truck capability, refined luxury, and the confidence to tow, haul, and travel without compromise.