Equipment
Experience the top-tier luxury and capability of this 2026 GMC Sierra 2500 Denali Ultimate, finished in Downpour Metallic and equipped with premium features designed for demanding work and refined travel alike.
Inside, you'll find a thoughtfully crafted cabin with leather seating, heated and ventilated front seats, heated rear outboard seats, a heated steering wheel, wireless charging, and a Bose Premium Series 12-speaker audio system. Apple CarPlay, Bluetooth connectivity, SiriusXM capability, and steering wheel-mounted audio controls help keep you connected and entertained on every drive.
Built for serious towing and hauling, this Sierra is equipped with the Max Trailering Package, Gooseneck/5th Wheel Prep Package, and the ProGrade Trailering System. Trailer camera provisions, trailer viewing software, trailer tire pressure monitor sensors, and a bed view camera help provide added confidence when pulling a trailer. A spray-on GMC bedliner, rear wheelhouse liners, and LED cargo area lighting add everyday practicality.
The X31 Off-Road Package enhances capability off the beaten path, while advanced driver-assistance technologies help support awareness on the road. Features include adaptive cruise control, Trailer Side Blind Zone Alert, Rear Cross Traffic Alert, HD Surround Vision, Safety Alert Seat, front and rear park assist, and a rear vision camera.
Additional highlights include a power sunroof, power sliding rear window, rain-sensing wipers, remote start, keyless open and start, all-weather floor liners, black molded splash guards, and convenient 120-volt power outlets in both the cabin and truck bed.
Combining premium Denali Ultimate appointments, advanced trailering technology, and heavy-duty capability, this GMC Sierra 2500 is ready for long hauls, tough jobs, and everyday driving in equal measure.
Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of included equipment with the dealer prior to purchase.
Packages
Max Trailering Package: 11. 750 lbs (5. 330 Kg) GVWR; Gooseneck/5th Wheel Prep Package. Preferred Equipment Group 5SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Power Sliding Rear Window with Defogger; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Signature Denali Ultimate Grille in Vadar Chrome; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Trailer Tire Pressure Monitor Sensors; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; LED Smoked Amber Roof Marker Lamps; Technology Package; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Steering Wheel Audio Controls; 2 Charge-Only Rear USB Ports; Universal Home Remote; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Power Sunroof; Keyless Open and Start; ProGrade Trailering System; Bose Premium Series 12-Speaker System; Push Button Start; Rear Wheelhouse Liners. Gooseneck/5th Wheel Prep Package. Downpour Metallic. Black Front and Rear Molded Splash Guards. All-Weather Floor Liners. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**
New 2026 GMCSierra Denali Ultimate
- Diesel
- Exterior Color
- Downpour Metallic
- Interior Color
- Alpine Umber
- Body/Seating
- Crew Cab/5 seats
- Seats
- 5 seats
- Transmission
- 10-speed automatic
- Drivetrain
- 4WD
- Engine
- V8, 6.6L
- VIN
- 1GT4UXEY3TF300646
- Stock Number
- C26368
Highlighted Features
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Power moonroof
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
Included Packages & Accessories
- Max Trailering Package: 11
- 750 lbs (5
- 330 Kg) GVWR; Gooseneck/5th Wheel Prep Package
- Preferred Equipment Group 5SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Power Sliding Rear Window with Defogger; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Signature Denali Ultimate Grille in Vadar Chrome; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Trailer Tire Pressure Monitor Sensors; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; LED Smoked Amber Roof Marker Lamps; Technology Package; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Steering Wheel Audio Controls; 2 Charge-Only Rear USB Ports; Universal Home Remote; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Power Sunroof; Keyless Open and Start; ProGrade Trailering System; Bose Premium Series 12-Speaker System; Push Button Start; Rear Wheelhouse Liners
- Gooseneck/5th Wheel Prep Package
- Downpour Metallic
- Black Front and Rear Molded Splash Guards
- All-Weather Floor Liners
- Apple CarPlay/Android Auto smart device wireless mirroring
- Forward Collision Alert with Automatic Braking
- Front Pedestrian Braking
- Wi-Fi Hotspot capable mobile hotspot internet access
- HD Rear Vision Camera w/Hitch View rear mounted camera
- Adaptive cruise control
- Head-up display
- Automatic Emergency Braking predictive brake assist system
- Cruise control with steering wheel mounted controls
- Ventilated driver and front passenger seats
- Keyfob remote start
- Heated steering wheel
- Heated driver and front passenger seats
- Heated rear seats
- Leather front seat upholstery
- Primary monitor touchscreen
- Lane Departure Warning
- Rear Cross-Traffic Alert collision warning
- First-row sliding and tilting glass sunroof with express open/close activation sunshade
- Driver seat power reclining
- lumbar support
- seatback side bolster support
- cushion tilt
- fore/aft control and height adjustable control
- AutoTrac part and full-time 4WD
- Duramax 6.6L V-8 diesel direct injection
- intercooled turbo
- diesel
- engine with 470HP
- Duramax 6.6L V-8
- Front wireless smart device charging
- Google Built-In built-in virtual assistant
- Teen Driver restricted driving mode/alerts
- Keyless Open/Keyless Start with hands-free access and push button start
- Keyfob window control
- HD Surround Vision w/Hitch View aerial view camera
- Smart device remote start
- Push-button
- GCW Alert weight capacity alert
- Video-feed rearview mirror
- Stolen Vehicle Assistance vehicle tracker with vehicle slowdown
- Bluetooth wireless audio streaming
- Hitch Guidance vehicle to trailer hitching assist
- Gauge cluster display size: 12.30
- Front mounted camera with washer
- Right side camera
- Pickup box camera
- Left side camera
- Trailer Side Blind Zone Alert blind spot warning
- Following Distance Indicator
- Trailer tire pressure sensors
- Trailer light test
- Trailer light malfunction warning
- Trailer theft alarm
- Dual-zone front climate control
- Full gauge cluster screen
- Auto high-beam headlights
Detailed Specifications
- 1-touch down
- 1-touch up
- Adaptive Cruise Control
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Moonroof sunshade: manual
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power moonroof
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start
- Remote keyless entry
- Speed control
- Surround View Monitor: HD Surround Vision w/Hitch View yes
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front wheel independent suspension
- Power steering
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- 1st row LCD monitors: 2
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 13.4"
- Smart device integration: Apple CarPlay/Android Auto
- Speaker type: Bose Performance Series
- Speakers: 12
- Steering wheel mounted audio controls
- Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
- Wireless Phone Charger: front
- Wireless phone connectivity: Bluetooth
- Basic warranty: 36 months/36,000miles
- Corrosion perforation warranty: 72 months/100,000miles
- Diesel engine warranty: 60 months/100,000miles
- Maintenance warranty: 12 months/ unlimited distance
- Front center armrest
- Front seats: bucket
- Genuine wood dashboard insert
- Genuine wood door panel insert
- Heated front seats
- Heated rear seats
- Leather steering wheel
- Leather upholstery
- Max seating capacity: 5
- Power 4-way driver lumbar support
- Power 4-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: leather
- Split folding rear seat
- Ventilated front seats
- Block heater
- Compressor: intercooled turbo
- Cylinder configuration: V-8
- Drive type: four-wheel
- Electric motor 1 torque: none
- Electric motor horsepower: none
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Horsepower: 470hp @ 2,800RPM
- Hybrid electric powertrain type: none
- Hybrid system combined power torque: none
- Hybrid system net power: none
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 32
- Rear locking differential
- Recommended fuel: Diesel
- Standard fuel economy fuel type: diesel
- Torque: 975 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- Ground clearance (min): 257mm (10.1")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Door mirrors: chrome
- Heated door mirrors
- Hitch Class: IV
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Trailer hitch
- Trailer sway control
- Turn signal indicator mirrors
- Compression ratio: 16.00 to 1
- Curb weight: 3,734kg (8,233lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine torque: 975 lb.-ft. @ 1,600RPM
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,027mm (79.8")
- Exterior length: 6,369mm (250.8")
- Front headroom: 1,013mm (39.9")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- Payload: 1,404kg (3,096lbs)
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Turning radius: 8.0m (26.3')
- Wheelbase: 4,039mm (159.0")
- Appearance: digital/analog
- Auto high-beam headlights
- Blind spot: Trailer Side Blind Zone Alert warning
- Compass
- Configurable
- Delay-off headlights
- Exterior parking camera cargo
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera rear: HD Rear Vision Camera w/Hitch View yes
- Exterior parking camera right
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Heads up display
- Lane departure: Lane Departure Warning warning
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: UltraSonic front and rear
- Rain sensing wipers
- Rear reading lights
- Rear window defroster
- Tachometer
- Trip computer
- Variably intermittent wipers
- Voltmeter
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Forward collision: Forward Collision Alert with Automatic Braking mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Rear collision: Rear Cross-Traffic Alert warning
- Security system
- Traction control
Dealer Notes
KBB.com Consumer Reviews
