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2025 GMC Sierra 2500 HD Crew Cab
AT4 Pickup 4D 6 1/2 ft
368 miles
Includes:$15,860 in factory upgrades
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Why You’ll Love This Sierra 2500

Slotted above the SLT and below the AT4X and Denali tiers in the Sierra 2500 HD lineup, the AT4 brings confident capability with adventure-ready engineering, protective underbody skid plates, a large infotainment touchscreen, and the ProGrade Trailering System.

AT4 Premium Plus Package

Originally valued at $4,035, this package adds a power sunroof, off-road high clearance steps, a power sliding rear window with defogger, and LED smoked amber roof marker lamps for enhanced utility and style.

Duramax 6.6L Turbo-Diesel V8 Engine

Originally valued at $9,990, this engine provides substantial power and torque for demanding towing and hauling tasks.

Volcanic Red Tintcoat

Originally valued at $645, this paint finish adds a deep, rich red hue with a multi-layer effect, enhancing the vehicle's exterior presence.

Gooseneck/5th Wheel Prep Package

Originally valued at $545, this package provides the necessary bed-mounted hardware and wiring to easily connect gooseneck or fifth-wheel trailers.

Serious towing power

Unleashes 470 HP and 975 lb-ft through a Duramax 6.6L Turbo-Diesel V8 engine, Allison 10-speed automatic transmission and 4WD, providing a maximum fifth-wheel/gooseneck towing capacity of 21,190 lbs with an exhaust brake for controlled descents.

Off-road suspension

Provides enhanced capability and a smoother ride over varied terrain with specialized Rancho shocks.

Adventure-ready engineering

The AT4 trim is engineered for off-road capability and premium comfort, supporting demanding work and adventurous lifestyles.

Adaptive cruise control with trailering

Maintains a set following distance from the vehicle ahead, even when towing, reducing driver fatigue on long hauls.

Large infotainment touchscreen

Offers a prominent 13.4-inch diagonal touchscreen display for intuitive control of media, navigation and vehicle settings.

ProGrade trailering system

Simplifies towing with an in-vehicle app that provides checklists, trailer profiles and maintenance reminders for confident hauling.

Underbody skid plates

Protects critical underbody components from damage when navigating rough terrain.

MultiPro tailgate

Offers six versatile functions, including a standing workstation, load stop and easy access step, enhancing bed utility.

Heated and ventilated front seats

Provides year-round comfort with heated and ventilated perforated leather seating surfaces for the front occupants.

GMC Sierra HD Pro Safety

Includes Forward Collision Alert, Automatic Emergency Braking, Lane Departure Warning and IntelliBeam auto high beams for enhanced driver awareness and accident prevention.

Wireless smartphone integration

Connects your smartphone wirelessly for seamless access to navigation, music and apps through Apple CarPlay and Android Auto.

20-inch high gloss black aluminum wheels

High gloss black 20-inch aluminum wheels provide a bold visual statement, enhancing the vehicle's exterior profile.

This content is AI-generated and some details may not be 100% accurate. Refer to the details throughout this page for specific vehicle info.

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