GMC Sierra 1500 AT4 in Fort Worth, TX

Craving a pickup that feels just as comfortable tackling rugged trails as it does cruising down Texas highways? The GMC Sierra 1500 AT4 in Fort Worth, TX, at Texas Truck Barn brings off-road confidence, serious diesel muscle, and upscale cabin comfort together in one capable truck. Its factory-installed lift, specialized suspension, and underbody protection make challenging terrain more manageable, while its spacious Crew Cab welcomes up to five passengers. Whether you're hauling outdoor gear, heading to a remote campsite, or handling demanding jobs, this Sierra AT4 brings the strength and versatility to keep your plans moving.

How Powerful Is the GMC Sierra 1500 AT4?

The 2026 Sierra 1500 AT4 comes equipped with a Duramax® 3.0L Turbo-Diesel engine paired with a 10-speed automatic transmission. Producing 305 horsepower and 495 lb.-ft. of torque, this powertrain delivers the pulling strength needed for demanding tasks. With maximum towing capacity of up to 8,800 pounds when properly equipped, you can haul a travel trailer, fishing boat, or utility trailer loaded with equipment. Its Active Thermal Management system helps regulate engine temperatures, while the variable-geometry turbocharger supports responsive acceleration.

What Makes the Sierra AT4 Ready for Off-Road Adventures?

A factory-installed 2-inch lift, off-road suspension, and Rancho® monotube shocks help the AT4 tackle uneven surfaces and rocky paths. Ground clearance measures 11.1 inches with the short bed and 11.0 inches with the standard bed. The two-speed Autotrac® transfer case helps adapt traction to changing terrain, while underbody skid plates protect vulnerable components when traveling over rough ground.

What Comfort and Cargo Features Does the AT4 Offer?

Inside, heated and ventilated perforated leather front seats with Kalahari accents add comfort during long trips. The Crew Cab accommodates five passengers, while the cargo bed provides 62.9 cubic feet with the short bed or 71.7 cubic feet with the standard bed. Pack camping supplies, toolboxes, sports equipment, or home improvement materials with room to spare. 

Visit Texas Truck Barn in Fort Worth, TX, to explore the GMC Sierra 1500 AT4!