2026 GMC Sierra 2500HD AT4

This Sierra 2500HD AT4 comes equipped with essential features designed for capability and comfort:

The AT4 trim positions this Sierra as serious off-road equipment paired with genuine comfort. The Duramax diesel engine delivers the torque you need for towing and hauling, while the 2-Speed Active Transfer Case and off-road suspension tackle challenging terrain. The power-retractable assist steps make entry and exit straightforward, and LED cargo area lighting improves visibility in the bed.

Interior appointments reflect GMC's commitment to driver experience. The 10-way power driver seat with lumbar support, heated steering wheel, and dual-zone automatic climate control make long days behind the wheel manageable. The premium infotainment system keeps you connected with wireless charging, multiple USB ports, and integrated trailer camera provisions for confident hauling.

The AT4 Premium Plus Package elevates the experience further with a power sunroof and comprehensive technology integration. Three years of OnStar One provides peace of mind through emergency assistance and vehicle diagnostics.

Exterior details communicate capability and refinement. The 20-inch high-gloss black aluminum wheels, body-color wheel arch moldings, and gloss black grille insert bars define the AT4's distinctive appearance. Auto-dimming door mirrors, rain-sensing wipers, and heated mirrors handle weather transitions automatically.

This 2026 Sierra 2500HD AT4 represents the full-size heavy-duty truck category at its best equipped to work hard and designed to drive with confidence. Visit us to see how this truck can serve your needs.

Shop this pre-owned 2026 GMC Sierra 2500HD AT4 in Sterling Metallic at Louisiana Direct Auto in Lake Charles. This truck with 4WD drivetrain and Diesel Fuel power is one of the cars on our lot in Southwest Louisiana right now. Build a payment estimate, book a test drive, or start a trade-in online. The numbers you see here are the ones we pick up at the store. VIN 1GT4UPEY5TF298771 · Stock R25756.