2026 GMC Sierra 2500HD Denali 4WD Crew Cab Duramax Diesel, Ultimate Package, Leather, Bose Audio, SunroofThe 2026 GMC Sierra 2500HD Denali in Glacier White Tricoat is a heavy-duty diesel truck built for serious towing power, premium comfort, and everyday drivability. Powered by the Duramax 6.6L Turbo-Diesel V8 paired with a 10-speed automatic transmission, this 4WD crew cab delivers the strength and capability buyers are searching for when looking for a reliable diesel truck near Lawton, OK. With Denali luxury, advanced trailering technology, and a refined interior, this truck is ready for hauling equipment, towing trailers, or long highway drives.Standout FeaturesDuramax 6.6L Turbo-Diesel V8 delivering strong torque for towing10-speed automatic transmission for smooth performance4WD capability for work, weather, and off-road confidenceDenali Reserve Package with premium upgradesLeather seating with heated and ventilated front seatsHeated rear seats for added passenger comfortBose premium sound system for high-quality audioGMC infotainment system with navigation and large touchscreenWireless Apple CarPlay and Android AutoRemote start and push-button start for conveniencePower sunroof for an open, upscale feelMultiPro tailgate for easier loading and job site functionalitySpray-on bedliner for added durabilityPerformance and CapabilityBuilt for towing trailers, equipment, or RVs with confidenceDiesel engine provides strong pulling power under heavy loadsIntegrated trailer brake controller and hitch guidanceLocking rear differential improves traction when haulingHeavy-duty suspension designed for stability and durabilityIdeal for work, long-distance towing, or everyday useInterior Comfort and TechnologyPremium Denali interior with refined materials throughoutHeated and ventilated front seats for year-round comfortHeated rear seats for passenger convenienceHeated steering wheel for colder morningsLarge touchscreen infotainment system with navigationWireless smartphone integration for calls, music, and appsSpacious crew cab with excellent legroom for passengersSafety and Driver AssistanceForward collision alert with automatic emergency brakingLane departure warning and lane keep assistBlind zone alert and rear cross traffic alertHD surround vision camera for parking and towing visibilityFront and rear park assist for tight spacesWhy Buy from Southwest Buick GMC in Lawton, OKSouthwest Buick GMC is your trusted destination for heavy-duty trucks near Lawton, Fort Sill, Duncan, and Altus. Whether you are searching for a diesel truck with strong towing capability or a dependable work truck, we offer a transparent, no-hassle buying experience and a strong selection of GMC trucks ready to get the job done. Price includes: $2000 - Bonus Cash. Exp. 06/30/2026 Price includes dealer added accessories.