2026 GMC Sierra HD
2026 GMC Sierra HD OVERVIEW 
2026 GMC Sierra HD For Sale
- 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
2026 GMC Sierra HD MODELS
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Sierra HD PRO
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Sierra HD SLE
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Sierra HD SLT
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Sierra HD AT4
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Sierra HD AT4X
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Sierra HD Denali
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Sierra HD Denali Ultimate
GMC Sierra HD For Sale
2026 GMC Sierra HD PERFORMANCE 
SERIOUS TOWING POWER
The GMC Sierra 2500 HD Crew Cab offers available max towing of up to 21,870 lbs.*
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.
ADVANCED TRAILERING TECH
The 2026 Sierra Heavy Duty truck offers advanced trailering-assistance technologies so you can trailer with confidence.
2026 GMC Sierra HD APPEARANCE 
BOLD FRONT END
Stand out everywhere you go with GMC Sierra HD Denali’s iconic chrome grille, front bumper and fascia.
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.*
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.
2026 GMC Sierra HD COMFORT 
13.4" DIAGONAL 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.
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 Crew Cab front head and leg room.*
2026 GMC Sierra HD SAFETY & WARRANTY 
PRO GRADE PROTECTION
Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:
- 3-year / 36,000-mile Bumper-to-Bumper Limited Warranty
- 5-year / 60,000-mile Powertrain Limited Warranty
- 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
- 3-year / 36,000-mile Corrosion Protection
- 6-year / 100,000-mile Rust-Through Protection
- First maintenance visit
SIDE BLIND ZONE ALERT
Side Blind Zone Alert can provide side-mirror visual alerts when a moving vehicle is detected in a side blind zone. It can help you avoid lane change collisions.
REAR PARK ASSIST
Rear Park Assist* can provide distance alerts to nearby detected objects behind your vehicle to help you park and avoid collisions when you’re in Reverse at low speeds.
FORWARD COLLISION ALERT
Forward Collision Alert can warn you if it detects a potential front-end collision with a vehicle you’re following so you can quickly take action. It can also provide a tailgating alert if you’re following a vehicle much too closely.