New 2026 Gmc Sierra 2500 HD AT4

Vehicle Details. 2026 GMC Sierra 2500 AT4 4WD with V8 6-cylinder diesel — available now in Tullahoma, TN. This heavy-duty truck combines proven diesel torque with premium comfort and advanced safety features, making it ideal for work and weekend adventures. The powerful engine delivers exceptional towing and hauling capacity, paired with a durable 4WD system designed for confident performance on rough terrain or in challenging weather. Inside, refined leather seats offer long-haul comfort while Apple CarPlay and Bluetooth keep you connected and entertained on the road. Driver-assist technologies include a back-up camera and cross-traffic alert to help navigate tight job sites and busy parking lots. The vehicle is pure luxury with a heated steering wheel. This GMC Sierra delivers the balance of strength, sophistication, and modern convenience buyers want, with thoughtful features for safety and connectivity.