Sierra Heavy Duty’s available Duramax 6.6L Turbo-Diesel V8 engine features an efficient turbocharger and Allison 10-speed automatic transmission.
AT4 features an off-road suspension with twin-tube Rancho shocks, skid plates and Hill Descent Control, which uses antilock braking to help you maintain control.
This advanced suite of available intelligent technologies helps streamline the hitching and towing process with integrated tools that help enhance your sense of confidence and visibility.
Stand out with AT4’s bold front-facing exterior design and LED projector headlamps with animated sequences.
Sierra HD AT4’s 20" gloss-black aluminum wheels with available BFGoodrich off-road tires are made for rough trails.
Help protect the bed and enhance its style with durable cargo bed protection featuring a GMC logo.
AT4X’s interior features authentic Vanta Ash wood, and seats include bold red and white double-needle stitching for athletic character.
Help protect your interior with available floor liners with removable carpet inserts.
With available Google built-in compatibility,* this system offers a helpful, personalized and seamless way to enhance the entertainment in your truck.
Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:
Rear Park Assist* can provide distance alerts to nearby detected objects behind your vehicle to help you park and avoid collisions when you’re in Reverse at low speeds.
*Feature will not function on certain models without dealer retrofit; see dealer for details.
Blind Zone Steering Assist can provide a brief, firm turn of the steering wheel when a potential collision is detected with a moving vehicle in the lane you’re entering.
Forward Collision Alert can warn you if it detects a potential front-end collision with a vehicle you’re following so you can quickly take action. It can also provide a tailgating alert if you’re following a vehicle much too closely.