2026 Sierra HD
PRO
The New 2026 GMC Sierra HD
2026 GMC Sierra HD Available Trims
2026 Sierra HD
SLE
2026 Sierra HD
SLT
2026 Sierra HD
AT4
More Trims
2026 Sierra HD
AT4X*
2026 Sierra HD
DENALI
2026 Sierra HD
DENALI ULTIMATE
*AT4X trim not available for the Sierra 3500 HD
Overview
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.
Tailgate
Available 6-Way MultiPro Tailgate.
Towing
Available 3500 HD max towing of up to 36,000 lbs.
Visibility
Get help seeing around your truck and compatible trailer with up to 14 available camera views, including the industry-first available transparent trailer view.
Engine
Available DURAMAX® 6.6L turbo-diesel V8 engine with 975 Lb-ft. of torque 470 HP.
Exterior
Powerfully bold. Impressively stylish.
Take on the world in first-class style.
Bold Front End
Stand out everywhere you go with GMC Sierra HD Denali's iconic chrome grille, front bumper, and fascia.
LED Projector Headlamps and Signature Lighting
LED projector headlamps with striking animated sequences help enhance the Sierra Heavy Duty work truck’s impressive exterior design.
MultiPro Tailgate
The powerfully innovative available MultiPro Tailgate combines six convenient functions to help make light work of almost any job. Shown with available MultiPro Audio System by KICKER.
Signature HD Wheels
Close-up View of the Wheel on a 2026 GMC Sierra HD
Interior
Premium interiors to make every trip first-class.
On Denali and Denali Ultimate trims, Experience uncompromising luxury with premium amenities and our finest materials.
16-Way Power Front Seats with Massage 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.
Crew Cab Comfort
The 2026 GMC Sierra HD back row offers optional jet black interior seats with Kalahari accents.
Capability
Serious power. Serious trailering.
Strong, smart, and advanced.
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.
Adaptive Cruise Control with Trailering
This available feature allows the truck's Adaptive Cruise Control to account for additional drag and increased braking distances when towing a trailer.
Technology
Keep informed and in command.
Go confidently with available OnStar technology. Enjoy the convenience of remote commands, the reassurance of Automatic Crash Response, and the entertainment of in-vehicle apps.
13.4-Inch Digital Premium GMC Infotainment System
The color touchscreen with Google built-in compatibility and voice-activated technology for your phone provides a seamless way to customize your entertainment.
15-Inch Diagonal Multicolor Heads-Up Display
The available 15" diagonal Head-Up Display helps keep important information like speed and alerts in clear view.
12.3-Inch Diagonal Color Driver Information Center
GMC Sierra HD features a driver-focused display that puts information front and center and is easily visible in high-resolution clarity.
12-Speaker Bose Sound System
The technologically advanced available 12-speaker Bose Premium Series with Centerpoint surround sound helps create a concert-like listening experience.
New 2026 GMC Sierra HD - Gallery
Disclaimer
Product information may feature optional equipment and accessories. Please see Thorson Motor Center for specific product availability.
* MSRP excludes destination handling fees, tax, title, license, and registration. Images may include optional equipment and accessories at extra cost.
** EPA-estimated mpg ratings. Your mileage may vary for many reasons, including your vehicle’s condition and how/where you drive.