Covert Bee Cave, a family tradition since 1909Covert Bee Cave, a family tradition since 1909

Home / New vehicles / GMC / Sierra 2500HD

New · Covert Buick GMC Bee Cave

2026 GMC Sierra 2500HD Denali Ultimate

VIN 1GT4UXEY5TF378216 · Stock TF378216

2026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 1 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 2 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 3 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 4 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 5 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 6 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 7 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 8 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 9 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 10 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 11 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 12 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 13 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 14 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 15 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 16 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 17 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 18 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 19 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 20 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 21 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 22 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 23 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 24 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 25 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 26 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 27 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 28 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 29 of 302026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic, photo 30 of 30
30 photos

Details

Engine
6.6L V8 diesel
Transmission
10-speed automatic
Drivetrain
4WD
Engine
Duramax 6.6L V8 Turbodiesel
Body
4D Crew Cab
Exterior
Sterling Metallic
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
  • AM/FM radio: SiriusXM with 360L
  • Bose Premium Series 12-Speaker System
  • Premium audio system: Premium GMC Infotainment System
15 more
  • 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
19 more
  • Bumpers: body-color
  • Front License Plate Kit
  • 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

Call us at 512-954-9290

Introducing the 2026 GMC Sierra 2500HD Denali Ultimate, a premium heavy-duty truck engineered for those who demand capability and refinement. This new Crew Cab arrives finished in striking Silver with luxurious Alpine Umber Leather seating, combining rugged strength with upscale comfort. Powered by the legendary Duramax 6.6L V8 Turbodiesel engine paired with a 10-Speed Automatic transmission and 4WD, this Sierra delivers commanding performance for towing, hauling, and off-road exploration.

- Gooseneck/5th Wheel Prep Package with hitch platform

- X31 Off-Road Package featuring hill descent control and off-road suspension

- Technology Package with HD surround vision and wireless phone projection

- Multicolor 15" Head-Up Display with trailer viewing software

- Premium Bose 12-speaker audio system with SiriusXM 360L trial subscription

- Heated and ventilated leather front seats with 16-way power adjustment

- Power sunroof with panoramic glass

- Spray-on bed liner with GMC logo and LED cargo lighting

- Advanced safety suite with automatic emergency braking and trailer side blind zone alert

- Signature Denali Ultimate Vadar Chrome grille and LED smoked amber roof markers

The Denali Ultimate trim represents the pinnacle of Sierra 2500HD luxury and capability. Every detail—from the keyless entry and wireless charging to the Ultrasonic Park Assist and rear cross traffic alert—has been thoughtfully designed to enhance your driving experience. Come see this exceptional truck today and discover why the 2026 Sierra 2500HD Denali Ultimate sets the standard for premium heavy-duty trucks.

Call us at 512-954-9290 Price includes: $2000 - GMC Bonus Cash. Exp. 11/30/2026

Check availability

2026 GMC Sierra 2500HD Denali UltimateStock TF378216 · Covert Buick GMC Bee Cave

An email or a phone number is enough.

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

2026 GMC Sierra 2500HD Denali UltimateStock TF378216 · Covert Buick GMC Bee Cave

An email or a phone number is enough.

By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email.

Ask a question

2026 GMC Sierra 2500HD Denali UltimateStock TF378216 · Covert Buick GMC Bee Cave

An email or a phone number is enough.

By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email.