Vehicle Overview

This 2021 GMC Sierra 2500HD AT4 delivers strong diesel performance with off-road capability and premium comfort. Powered by a 6.6L Duramax turbocharged V8 paired with a 10-speed Allison automatic transmission and four-wheel drive, it produces 445 horsepower and 910 lb-ft of torque for serious towing and hauling.

Equipped with factory AT4 off-road suspension, skid plates, and red recovery hooks, it is further upgraded with a 3-inch Cognito leveling lift, Fox 2.0 shocks, 20-inch Fuel Off-Road D670 wheels, and 35-inch Nitto Ridge Grappler tires for enhanced stance and capability. Exterior features include LED lighting, fog lamps, running boards, power-folding trailer mirrors, side and rear bed steps, spray-on bedliner, a custom front bumper with grille guard, MultiPro tailgate, and window tint.

Inside, the cabin is trimmed in leather with heated and ventilated front seats, heated rear seats, and a heated leather steering wheel, along with dual-zone automatic climate control, remote start, a power-sliding rear window, universal home remote, and multiple 12V/120V outlets.

Technology includes an 8-inch touchscreen infotainment system with wireless Apple CarPlay and Android Auto, Bluetooth connectivity, Wi-Fi capability, and audio integration.

A highly capable and versatile heavy-duty truck, this Sierra 2500HD AT4 combines diesel power, off-road upgrades, and refined interior features in one complete package.