2025 GMC Sierra 3500HD AT4 is a heavy-duty pickup built for serious capability, off-road confidence, and premium comfort. Available now at Lewisburg Motor Company, this powerful truck combines rugged performance with modern technology and refined interior features. It is equipped with the legendary 6.6L Duramax® Turbo-Diesel V8 engine paired with the Allison® 10-speed automatic transmission, delivering exceptional towing power and impressive torque for demanding jobs or weekend adventures.

The AT4 trim is designed for drivers who want both work capability and off-road performance. It features an off-road suspension system with Rancho shocks, skid plates for underbody protection, and bold AT4 styling that gives the truck a commanding presence on the road.

Inside the cabin, the Sierra 3500HD AT4 offers a premium and spacious interior with advanced technology designed to keep you comfortable and connected. A large 13.4-inch touchscreen infotainment system, wireless Apple CarPlay and Android Auto, Bose premium audio, and heated and ventilated seating create a refined driving experience.

This truck also includes advanced safety and driver-assist features such as HD Surround Vision, adaptive cruise control, and multiple trailering technologies to make towing easier and safer. With its clean title and clean CARFAX, this 2025 GMC Sierra 3500HD AT4 at Lewisburg Motor Company is ready for work, adventure, and everything in between.