2026 GMC Sierra 2500HD AT4

Used
Diesel

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$91,355Price

ORR Pre-Owned of Longview

Call 903-500-4343

More pre-installed items

AT4 Preferred Package
AT4 Premium Package
Gooseneck/5th Wheel Prep Package
Hitch Package

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Convenience Features

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
Heated steering wheel
Illuminated entry
Memory seat
Overhead console
Passenger door bin
Passenger vanity mirror
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

Suspension/Handling

Alloy wheels
Front anti-roll bar
Front wheel independent suspension
Power steering
Single rear wheels
Speed-sensing steering
Tires: all-terrain

Entertainment Features

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
Speakers: 7
Steering wheel mounted audio controls
Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
Wireless Phone Charger: front
Wireless phone connectivity: Bluetooth

Seats and Trim

Front center armrest
Front seats: bucket
Heated front seats
Heated rear seats
Leather upholstery
Max seating capacity: 5
Power 2-way driver lumbar support
Power 2-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

Powertrain

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.
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
Rear locking differential
Transmission: 10 speed automatic
Variable valve control

Body Exterior

Auto-dimming door mirrors
Bedliner
Bumpers: body-color
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

Specs and Dimensions

Engine displacement: 6.6 L
Exterior body width: 2,079mm (81.8")
Exterior height: 2,027mm (79.8")
Exterior length: 6,369mm (250.8")
Front hiproom: 1,554mm (61.2")
Front legroom: 1,131mm (44.5")
Front shoulder room: 1,677mm (66.0")
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")

Lighting, Visibility and Instrumentation

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
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

Safety and Security

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

Meet the 2026 GMC Sierra 2500HD AT4 In-Transit, a premium heavy-duty truck engineered to deliver exceptional capability and refined comfort for those who demand performance without compromise.

- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD
- AT4 Preferred and Premium Packages for enhanced off-road readiness
- Gooseneck/5th Wheel Prep Package for serious towing applications
- Technology Package with advanced driver assistance features
- Multicolor 15" Diagonal Head-Up Display
- Inside Rearview Auto-Dimming Rear Camera Mirror with Bed View Camera
- Keyless Open and Start with Remote Vehicle Starter System
- Power Sunroof and Power Sliding Rear Window with Defogger
- HD Surround Vision with Trailer Side Blind Zone Alert
- Bose Premium 7-Speaker Sound System with SiriusXM 360L
- Heated and Ventilated Leather Front Seats with 10-Way Power Adjustment
- 20" High Gloss Black Aluminum Wheels
- Wireless Charging and Apple CarPlay/Android Auto compatibility
- Spray-On Pickup Bedliner with GMC Logo

This Sierra 2500HD represents the pinnacle of heavy-duty engineering. The Duramax diesel powerplant delivers the torque and hauling capacity serious work demands, while the sophisticated suspension geometry and available off-road technologies ensure confident handling across varied terrain. Whether managing demanding job sites or tackling weekend adventures, this truck responds with authority and control.

The interior reflects GMC's commitment to driver-focused design. Premium leather seating with multiple power adjustments and heating capabilities create a command center that prioritizes comfort during long hours behind the wheel. The cabin incorporates thoughtful storage solutions, advanced connectivity through wireless projection and multiple USB charging ports, and premium audio quality through the Bose sound system paired with SiriusXM 360L satellite radio.

Safety and visibility have been engineered into every aspect of this truck. The surround vision camera system, automatic emergency braking, lane departure warning, and trailer side blind zone alert work cohesively to protect occupants and cargo. The inside rearview camera mirror and bed view camera with trailer camera provisions provide clarity when backing up or managing trailers, while forward collision alert and pedestrian braking add layers of protection.

With the AT4 packages and X31 Off-Road equipment, this Sierra 2500HD stands ready for challenging conditions. The 2-Speed Active Transfer Case, hill descent control, and off-road suspension geometry provide the foundation for genuine capability, while the Hitch Package and gooseneck/5th wheel prep accommodate serious towing needs.

This 2026 GMC Sierra 2500HD AT4 In-Transit is built for buyers who understand that true capability requires more than powerâ"it demands refinement, technology, and dependable engineering. Visit us today to experience firsthand how this truck integrates strength with sophistication. Not all customers may qualify for all rebates listed, see dealer for details. Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 08/03/2026 Price includes $225 in dealer added accessories.

2026 GMC Sierra 2500HD AT4

The overview

The highlights