Slotted above the SLT and below the Denali and Denali Ultimate within the Sierra HD lineup, the AT4 brings an off-road focus and premium touches to this capable Crew Cab, elevating daily usability with its robust AT4 trim capability, off-road suspension, a large 13.4-inch center touchscreen, and a versatile MultiPro tailgate.
AT4 Premium Plus Package
Originally valued at $4,070, a power sunroof, power sliding rear window with defogger and adaptive cruise control are included, enhancing convenience and comfort.
Duramax 6.6L Turbo-Diesel V8 Engine
Originally valued at $9,490, robust power and torque are delivered by this engine, making it ideal for heavy-duty towing and hauling applications.
Power-Retractable Black Assist Steps
Originally valued at $2,295, automatic extension and retraction of these assist steps provide easier cabin access and improved ground clearance.
Volcanic Red Tintcoat
Originally valued at $645, a deep, rich red color is provided by this paint finish, enhancing the vehicle's exterior presence.
Gooseneck/5th Wheel Prep Package
Originally valued at $545, necessary provisions for installing gooseneck or 5th wheel hitches are included, simplifying heavy-duty trailer connections.
Massive diesel power
Unleashes massive 470 HP and 975 lb-ft through its Duramax 6.6L Turbo-Diesel V8 engine, Allison 10L1000 10-speed automatic transmission and 4WD system for serious towing and hauling power.
AT4 trim capability
The AT4 trim emphasizes off-road capability with specialized hardware and premium interior appointments.
Off-road suspension
Twin-tube Rancho shocks provide enhanced damping and control for challenging terrain.
13.4-inch center touchscreen
Intuitive control for media and vehicle settings is offered by a large 13.4-inch diagonal center touchscreen.
Surround-view camera system
A comprehensive 360-degree view around the vehicle is provided by this system, aiding in parking and maneuvering.
Leather seating surfaces
The front cabin's leather seating surfaces add a premium feel and comfortable ride.
MultiPro tailgate
Six versatile functions enhance cargo management and accessibility.
ProGrade Trailering System
An in-vehicle app within this system simplifies towing tasks and monitors trailer status.
Skid plates
Vital underbody components are protected by these plates when navigating rough off-road conditions.
Heated and ventilated front seats
Year-round comfort in varying temperatures is provided by these front seats.
Automatic Emergency Braking
This system helps prevent or mitigate collisions by automatically applying the brakes when needed.
Trailer Side Blind Zone Alert
Blind-spot monitoring is extended to include your trailer with this alert, enhancing safety during lane changes.
Wireless Apple CarPlay and Android Auto
Seamless smartphone app integration for navigation, music and communication is provided by these features.
Heated steering wheel
Your hands stay warm for added comfort in colder weather with this feature.
20-inch gloss-black aluminum wheels
A bold aesthetic and robust stance are provided by these distinctive 20-inch gloss-black aluminum wheels.
20-inch high gloss black aluminum wheels
High gloss black 20-inch aluminum wheels provide a distinctive visual element to the vehicle's profile.
This content is AI-generated and some details may not be 100% accurate. Refer to the details throughout this page for specific vehicle info.
