[Home](/) / [New vehicles](/new-vehicles/) / [GMC](/new-vehicles/gmc/) / [Sierra 2500HD](/new-vehicles/gmc/sierra-2500hd/) New · Covert Buick GMC Bee Cave # 2026 GMC Sierra 2500HD Denali Ultimate VIN 1GT4UXEY8TF257812 · Stock TF257812 ![2026 GMC Sierra 2500HD Denali Ultimate in Onyx Black, photo 1 of 52](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F6c0dda6e-838d-4351-8311-e585feb4baf9.png&w=3840&q=80)![2026 GMC Sierra 2500HD Denali Ultimate in Onyx Black, photo 2 of 52](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F1246d9ba-7a85-4eb0-8262-40e94c5cda48.png&w=3840&q=80)![2026 GMC Sierra 2500HD Denali Ultimate in Onyx Black, photo 3 of 52](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F0a6b2b03-dbfd-4375-b3e6-dba463b67e1a.png&w=3840&q=80)![2026 GMC Sierra 2500HD Denali Ultimate in Onyx Black, photo 4 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52](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F776dea48-a15f-4045-873f-3534ad70ed6c.jpg&w=3840&q=80) 52 photos Price$118,479 Price excludes tax, title, license and the $225 documentary fee. [Check availability](/inventory/new-2026-gmc-sierra-2500hd-denali-ultimate-4wd-4d-crew-cab-1gt4uxey8tf257812/?form=availability)[Schedule a test drive](/inventory/new-2026-gmc-sierra-2500hd-denali-ultimate-4wd-4d-crew-cab-1gt4uxey8tf257812/?form=test-drive)[Ask a question](/inventory/new-2026-gmc-sierra-2500hd-denali-ultimate-4wd-4d-crew-cab-1gt4uxey8tf257812/?form=question) [Calculate your payment](https://app.autoapr.com/reveal/4d0nhx37/1GT4UXEY8TF257812) ## Calculate your payment Close [Trading in your car for this GMC Sierra 2500HD?Get an offer for it and put it toward this one.](/value-your-trade/) Covert Buick GMC Bee Cave[(512) 954-9290](tel:+15129549290) 16501 Sweetwater Village Dr Bldg 1, Austin, TX 78738 Sales: Monday to Saturday, 9 AM to 7 PM; closed Sunday ### Details Engine 6.6L V8 diesel Transmission 10-speed automatic Drivetrain 4WD Engine Duramax 6.6L V8 Turbodiesel Body 4D Crew Cab Exterior Onyx Black Interior Alpine Umber Fuel Diesel ### Equipment 146 #### Packages * Gooseneck/5th Wheel Prep Package * Preferred Equipment Group 5SB * Technology Package * X31 Off-Road Package #### Safety * Emergency communication system: OnStar * Lane Departure Warning System * Security system * Unauthorized Entry Theft-Deterrent System 21 more * Automatic Emergency Braking * Buckle to Drive * Following Distance Indicator * Forward Collision Alert * Front Pedestrian Braking * HD Surround Vision * Inside Rearview Auo-Dimming Rear Camera Mirror * Rear Cross Traffic Alert * Ultrasonic Front and Rear Park Assist * Safety Alert Seat * Traction control * 4-Wheel Disc Brakes * ABS brakes * Dual front impact airbags * Dual front side impact airbags * Low tire pressure warning * Occupant sensing airbag * Overhead airbag * Brake assist * Electronic Stability Control * Panic alarm #### Technology * 12 Speakers * 3 Years SiriusXM * AM/FM radio: SiriusXM with 360L * Bose Premium Series 12-Speaker System 16 more * Premium audio system: Premium GMC Infotainment System * Radio: AM/FM Stereo with Premium GMC Infotainment System * SiriusXM with 360L Trial Subscription * Steering Wheel Audio Controls * 120-Volt Bed Mounted Power Outlet * 120-Volt Instrument Panel Power Outlet * Heads-Up Display * 2 Charge-Only Rear USB Ports * 2 Charge/Data USB Ports Inside Center Console * 2 USB Ports * Apple CarPlay/Android Auto * Multicolor 15" Diagonal Head-Up Display * OnStar Services Capable * Wireless Charging * Wireless Phone Projection * Steering wheel mounted audio controls #### Interior * Automatic temperature control * Electric Rear-Window Defogger * Front dual zone A/C * Rear window defroster 53 more * Driver Memory * Memory seat * Power driver seat * Push Button Start * Remote Vehicle Starter System * Universal Home Remote * Manual Tilt-Wheel/Telescoping Steering Column * Keyless Open and Start * Power moonroof * Power Sunroof * LED Cargo Area Lighting * Auto-dimming Rear-View mirror * Floor-Mounted Center Console * Garage door transmitter * Genuine wood dashboard insert * Genuine wood door panel insert * Heated steering wheel * Leather steering wheel * Rear reading lights * Rear seat center armrest * Voltmeter * 16-Way Power Driver Seat Adjuster with Lumbar * 16-Way Power Passenger Seat Adjuster with Lumbar * Front Center Armrest * Full Grain Leather Seat Trim * Heated 2nd Row Outboard Seats * Heated Driver and Front Outboard Passenger Seats * Heated front seats * Heated rear seats * Power passenger seat * Ventilated Driver and Front Passenger Seats * Ventilated front seats * Power Front Passenger Windows with Express Up/Down * Power Sliding Rear Window with Defogger * Air Conditioning * Power windows * Remote keyless entry * Speed control * Compass * Driver door bin * Driver vanity mirror * Front reading lights * Illuminated entry * Outside temperature display * Overhead console * Passenger vanity mirror * Tachometer * Telescoping steering wheel * Tilt steering wheel * Trip computer * Front Bucket Seats * Split folding rear seat * Passenger door bin #### Exterior * Pickup Box * Auto High-beam Headlights * Front fog lights * Auto-dimming door mirrors 18 more * Bumpers: body-color * IntelliBeam Automatic High Beam on/Off * LED Smoked Amber Roof Marker Lamps * Rear step bumper * Rear Wheelhouse Liners * Signature Denali Ultimate Grille in Vadar Chrome * Spray-on Pickup Bedliner with GMC Logo * Turn signal indicator mirrors * Wheels: 20" Ultra-Bright Machined Aluminum * Deep-Tinted Glass * Front Rain-Sensing Wipers * Rain sensing wipers * Delay-off headlights * Fully automatic headlights * Heated door mirrors * Power door mirrors * Alloy wheels * Variably intermittent wipers #### Mechanical * Off-Road Suspension * Speed-sensing steering * Front wheel independent suspension * Hill Descent Control 14 more * 2-Speed Active Transfer Case * 220-Amp Alternator * Block heater * Dual Heavy-Duty 70 Amp Battery * Bed View Camera with Two Trailer Camera Provisions * Trailer Cam Provisions and Trailer Viewing Software * Trailer Side Blind Zone Alert * Upfitter Switch Kit (5) * Hitch Guidance with Hitch View * in-Vehicle Trailering System App * Trailer Tire Pressure Monitor Sensors * 3.42 Axle Ratio * Power steering * Front anti-roll bar ### From the store Discover the pinnacle of power and luxury with the 2026 GMC Sierra 2500HD Denali Ultimate. This exceptional heavy-duty pickup is a true testament to uncompromising performance and refined sophistication. At the heart of this Denali Ultimate lies the robust Duramax 6.6L V8 Turbodiesel engine, mated to a smooth-shifting 10-speed automatic transmission and a capable 4WD system. Boasting a meticulously crafted exterior in a striking Black color, this Sierra 2500HD is a commanding presence on the road. \- Gooseneck/5th Wheel Prep Package \- Preferred Equipment Group 5SB \- Technology Package \- X31 Off-Road Package \- Bose Premium Series 12-Speaker System \- SiriusXM with 360L Trial Subscription \- Steering Wheel Audio Controls \- Electric Rear-Window Defogger \- 120-Volt Bed Mounted Power Outlet \- Push Button Start \- Remote Vehicle Starter System \- Universal Home Remote This Denali Ultimate is meticulously equipped to elevate your driving experience. The 15" Diagonal Head-Up Display and Wireless Charging keep you connected and in control, while the Ventilated Seats and Heated Steering Wheel provide unparalleled comfort. The Trailer Cam Provisions and Trailer Viewing Software make towing a breeze, and the Ultrasonic Front and Rear Park Assist ensures effortless maneuverability. Designed to conquer the most demanding terrain, the Sierra 2500HD Denali Ultimate features an Off-Road Suspension, 2-Speed Active Transfer Case, and Hill Descent Control. The Spray-on Bedliner and Rear Wheelhouse Liners provide durable protection for your cargo, while the Signature Denali Ultimate Grille in Vadar Chrome adds a touch of refined style. Safety is paramount in this Denali Ultimate, with features like the Safety Alert Seat, Rear Cross Traffic Alert, and Trailer Side Blind Zone Alert keeping you and your loved ones secure. The Unauthorized Entry Theft-Deterrent System and the Trailer Tire Pressure Monitor Sensors provide additional peace of mind. Experience the pinnacle of power, luxury, and capability with the 2026 GMC Sierra 2500HD Denali Ultimate. Visit our showroom today and let us demonstrate how this exceptional truck can elevate your driving experience. Price includes: $2000 - GMC Bonus Cash. Exp. 11/30/2026 ## Check availability Close 2026 GMC Sierra 2500HD Denali UltimateStock TF257812 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. ZIP code (optional) Leave this field empty Check availability By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email. ## Schedule a test drive Close 2026 GMC Sierra 2500HD Denali UltimateStock TF257812 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. ZIP code (optional) Preferred day (optional) Time of day (optional)Any timeMorningAfternoonEvening Leave this field empty Schedule a test drive By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email. ## Ask a question Close 2026 GMC Sierra 2500HD Denali UltimateStock TF257812 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. 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