2026 Sierra HD
EXPLORE SIERRA HEAVY DUTY TRIMS
The GMC Sierra Heavy Duty is available in the hardworking Pro, the well-equipped SLT, the off-road ready AT4 and the luxurious Denali Ultimate trims.
PRO
Key Standard Features
- 6.6L V8 gas engine with 10-speed automatic transmission
- Trailering Package, Trailering Mirrors and Trailer Brake Controller
- Best-in-class HD cargo bed volume
- Wireless Apple CarPlay® and wireless Android Auto™ compatibility
Key Available Features
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
- Adaptive Cruise Control with trailering
SLE
Key Standard Features
- Includes Pro key standard features, plus adds or substitutes:
- 13.4" diagonal center touchscreen and 12.3" diagonal digital Driver Information Center
- Traction Select System with Tow/Haul mode
- 17" machined aluminum wheels
Key Available Features
- Up to 13 camera views, including transparent trailer view
- MultiPro™ Tailgate and MultiPro Tailgate Audio System by Kicker®
- X31 off-road package with twin-tube Rancho® shocks and skid plates
SLT
Key Standard Features
- Includes SLE key standard features, plus adds or substitutes:
- 10-way power driver and front outboard passenger heated seats with lumbar
- Heated steering wheel
- ProGrade® Trailering System with In-Vehicle Trailering App
- 18" machined aluminum wheels with dark grey metallic accents
Key Available Features
- 10-way power-adjustable front heated and ventilated bucket seats with perforated leather appointments
- MultiPro Tailgate and MultiPro Tailgate Audio System by Kicker
AT4
Key Standard Features
- Includes SLT key standard features, plus adds or substitutes:
- Exclusive Jet Black interior with Kalahari accents, and heated and ventilated perforated front leather seating surfaces
- Exclusive 20" gloss-black aluminum wheels with available BFGoodrich® off-road tires
- Off-Road Suspension Package with twin-tube Rancho shocks and skid plates
- Up to 14 available camera views with HD Surround Vision
- Adaptive Cruise Control with trailering
Key Available Features
- 15" diagonal Head-Up Display with off-road inclinometer
AT4X
Key Standard Features
- Includes AT4 key standard features, plus adds or substitutes:
- Factory-installed 1.5" suspension lift, Multimatic® DSSV dampers, rear electronic-locking differential, larger steel transfer case skid plate and front aluminum skid plate
- 35" Goodyear® Territory MT tires
- 16-way heated and ventilated power front seats with massage feature
- Obsidian Rush interior featuring full-grain leather seating with technical-grain leather accents and authentic Vanta ash wood
Key Available Features
- AT4X AEV Edition featuring stamped steel bumpers, steering gear and transfer case skid plates, and 18" Salta gloss-black wheels
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
DENALI
Key Standard Features
- Includes SLT key standard features, plus adds or substitutes:
- 20" Ultra-Bright machined aluminum wheels with bright chrome inserts
- Denali-exclusive authentic wood, patterned aluminum trim and Forge perforated leather seating surfaces
- 12-way heated and ventilated power front seats
Key Available Features
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
- Power sunroof
- Rear Camera Mirror
DENALI ULTIMATE
Key Standard Features
- Includes Denali key standard features, plus adds or substitutes:
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
- Signature Vader Chrome grille and exclusive 20" Ultra-Bright machined aluminum wheels with gloss-black inserts
- Exclusive Alpine Umber interior featuring full-grain leather seating, authentic Paldao wood and 16-way power front seats with massage feature
- 12-Speaker Bose® Premium Series with Centerpoint® surround sound
- Illuminated power assist steps and MultiPro™ Tailgate Audio System by KICKER®
Key Available Features
- Auxiliary trailer camera
TECHNOLOGY
Keep informed and in command.
CAPABILITY
Serious power. Serious trailering.
Duramax 6.6L Turbo-Diesel V8 Engine
The Sierra Heavy Duty truck's available Duramax 6.6L Turbo-Diesel V8 engine features an efficient turbocharger and 10-speed automatic transmission.
Serious Towing Power
The GMC Sierra 2500 HD Crew Cab offers available max towing of up to 21,870 lbs.
Advanced Trailering Tech
The 2026 Sierra Heavy Duty truck offers advanced trailering-assistance technologies so you can trailer with confidence.
EXTERIOR
Powerfully bold. Impressively stylish.
INTERIOR
Premium interiors to make every trip first-class.
16-Way Power Front Seats with Massaging Feature
Experience serious comfort in the Sierra Heavy Duty truck's available best-in-class 16-way power front seats with massaging feature.
Luxurious Materials
Sierra HD Denali Ultimate's Alpine Umber interior features full-grain leather seating, plaited contrast stitching, and embossed and laser-etched topographical map patterns of its namesake's mountain summit.
Spacious Cabin
The Sierra Heavy Duty truck features best-in-class standard Crew Cab front head and leg room.
Images are for illustration purposes only.
Prices shown are manufacturer suggested retail prices only and do not include taxes, license, or doc fee. Manufacturer vehicle accessory costs, labor and installation vary. Please contact us with any questions.
Based on 2024 EPA mileage ratings. Use for comparison purposes only. Your mileage will vary depending on driving conditions, how you drive and maintain your vehicle, battery-pack age/condition, and other factors. For additional information about EPA ratings, visit http://www.fueleconomy.gov/feg/label/learn-more-PHEV-label.shtml.
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Hight GMC Farmington
437 WILTON ROAD
FARMINGTON, ME 04938
- Sales: (207) 762-5034
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