The strong chassis and suspension are built upon a fully boxed, ladder-type frame built from high-strength steel using front hydroformed rails with clamshell design. The powerful frame and optimized body structure works in conjunction with larger driveline components that feature high-strength axles and ring gears to bring immediate torque to ground for increased power while towing and off-roading.
AT4’s Twin-Tube Rancho shocks provide dampening when going off road, skid plates provide added protection for underbody components and Eaton® locking rear differential helps give you traction to handle rugged terrain.
The sturdy AT4 high clearance step is designed to help you and passengers get in and out of your vehicle. Textured surface helps provide increased traction and accessibility, even in wet and muddy conditions. Made to withstand harsh elements and environments.
To assist in clearing rugged terrain, available Sierra HD AT4 offers up to 11.18" of ground clearance along with a maximum approach angle of 27 degrees.
Jet Black Perforated Front Leather Seating Surfaces with Kalahari Accents. GMC Sierra HD AT4 Crew Cab Full Interior Overhead View Shown.
Connect to Amazon Alexa Built-In for instant, hands-free access to music, directions, calls, news, weather and more.
Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:
Following Distance Indicator displays the gap time in seconds between your vehicle and a detected vehicle you’re following. This can help you decide if you are following much too closely. Available on base Sierra HD, SLE, SLT and AT4. Standard on Denali.
Automatic Emergency Braking works with Forward Collision Alert to help you avoid or reduce the severity of a front-end collision with a detected vehicle you are following. This feature works at speeds below 50 MPH. Camera technology is used to automatically provide hard emergency braking or enhance the driver’s hard braking. Available on base Sierra HD, SLE, SLT and AT4. Standard on Denali.
Rear Cross Traffic Alert can alert you to detected left- or right-cross traffic behind you when in Reverse. Available on Sierra HD, SLE, SLT, and AT4. Standard on Denali.