2025 GMC Sierra HD
2025 GMC Sierra HD OVERVIEW 
2025 GMC Sierra HD For Sale
- 12.3" diagonal color Driver Information Center
- Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline, (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm) (STD)
- 18" machined aluminum wheels with Dark Grey metallic accents
- Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
2025 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 DENALI
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Sierra HD AT4X
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Sierra HD DENALI ULTIMATE
GMC Sierra HD For Sale
2025 GMC Sierra HD PERFORMANCE 
DURAMAX 6.6L TURBO-DIESEL V8 ENGINE
Sierra Heavy Duty’s available Duramax 6.6L Turbo-Diesel V8 engine features an efficient turbocharger and Allison 10-speed automatic transmission.
ADVANCED TRAILERING TECH
The 2025 Sierra Heavy Duty offers more trailering-assistance technologies than any competitor in its class, so you can trailer with confidence.
2025 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.
SIX-FUNCTION MULTIPRO TAILGATE
The powerfully innovative available MultiPro Tailgate combines six convenient functions to help make light work of almost any job in your work truck.
LED PROJECTOR HEADLAMPS AND SIGNATURE LIGHTING
LED projector headlamps with striking animated sequences help enhance Sierra Heavy Duty’s impressive exterior design.
2025 GMC Sierra HD COMFORT 
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 Mt. Denali’s summit.
16-WAY POWER FRONT SEATS WITH MASSAGING FEATURE
Experience serious comfort in Sierra Heavy Duty’s available best-in-class* 16-way power front seats with massaging feature.
SPACIOUS CABIN
The Sierra Heavy Duty truck features best-in-class Crew Cab front head and leg room.*
15" DIAGONAL MULTICOLOR HEAD-UP DISPLAY
The available 15" diagonal Head-Up Display helps keep important information like speed and alerts in clear view.
2025 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
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.
FRONT AND REAR PARK ASSIST
Front and Rear Park Assist* can provide distance alerts to nearby detected objects in front of or behind your vehicle to help you park and avoid collisions at low speeds.
LANE CHANGE ALERT WITH SIDE BLIND ZONE ALERT*
Lane Change Alert with Side Blind Zone Alert can provide side-mirror visual alerts when a detected moving vehicle is quickly approaching or is in your side blind zone. It can help you avoid lane change collisions.