2026
GMC SIERRA 1500 AT4 4X4 CREW CAB 5.75 FT. BOX

The 2026 GMC Sierra 1500 AT4 is engineered for those who push past paved roads and ordinary expectations. Rugged by design and refined by intention, this off-road-focused pickup blends trail-rated capability with premium craftsmanship, delivering a bold presence that’s equally at home in the wild or on the daily drive. 

Performance & Capability 

• Engine: Duramax® 3.0L Turbo-Diesel delivering exceptional low-end torque, smooth power delivery, and impressive long-haul efficiency 

• Transmission: 10-speed automatic transmission for confident towing, precise shifting, and seamless acceleration 

• Drivetrain: Autotrac Two-Speed 4-Wheel Drive (4WD) for confident traction across snow, mud, gravel, and rock 

• Axle Ratio: 3.23 rear axle balancing strong towing capability with refined highway performance 

• Off-Road Suspension: AT4-specific off-road suspension with increased ground clearance for rugged terrain 

• Off-Road Hardware: Skid plates, automatic locking rear differential, and hill descent control for controlled confidence off the beaten path 

• Drive Modes: FlexRide drive mode system adapting throttle, steering, and traction for changing conditions 

Trailering & Driving Technology 

• Integrated trailer brake controller with Hitch Guidance and Hitch View 

• In-vehicle trailering app for towing setup, checklists, and monitoring 

• HD Surround Vision and Bed View Camera for enhanced visibility while maneuvering or hitching 

• Adaptive Cruise Control for reduced fatigue on long highway drives 

Interior Comfort & Adventure-Ready Refinement 

• AT4-exclusive Jet Black and Kalahari interior with bold accents and premium materials 

• Front Bucket Seats with power adjustment, ventilation, and heating 

• Heated Rear Outboard Seats and Heated Steering Wheel for cold-weather comfort 

• Dual-Zone Automatic Climate Control with air moisture and temperature sensors 

• Power Sliding Rear Window and Rear Seat Storage Package for added versatility 

• Wireless Charging Pad, USB ports, and 120V outlets throughout the cabin 

Connectivity & Infotainment 

• GMC Premium Infotainment System with 13.4" touchscreen and Google Built-In compatibility 

• Wireless Apple CarPlay® & Android Auto™ for seamless smartphone integration 

• 12" Digital Driver Information Display with customizable driving data 

• Bose® Premium Audio System delivering rich, immersive sound 

• 15" Multicolor Head-Up Display projecting key information directly into view 

Safety & Driver Assistance 

• GMC Pro Safety suite providing added confidence on every drive 

• Forward Collision Alert with Automatic Emergency Braking 

• Lane Keep Assist with Lane Departure Warning 

• Trailer Side Blind Zone Alert and Rear Cross Traffic Braking 

• Front & Rear Park Assist, Rear Pedestrian Alert, and Following Distance Indicator 

• Teen Driver Mode and Buckle-to-Drive for added peace of mind 

Exterior Styling & Utility 

• Exterior Colour: Summit White- clean, bold, and contrasted by AT4 blacked-out accents 

• 20" Machined Aluminum Wheels with Carbon Grey Metallic accents 

• All-Terrain Tires built for durability, grip, and trail confidence 

• Signature LED headlamps, fog lamps, perimeter lighting, and LED cargo bed lighting 

• GMC MultiPro™ Tailgate for versatile loading, step access, and worksite functionality 

• Spray-On Bedliner and 120V Bed-Mounted Power Outlet for real-world utility 

• Red Front Recovery Hooks and Off-Road High-Clearance Assist Steps for unmistakable AT4 attitude 

Whether you’re towing into the backcountry, navigating winter roads, or cruising highways in comfort, the 2026 GMC Sierra 1500 AT4 delivers rugged strength, advanced technology, and refined design. It’s a truck built for exploration, tough enough for adventure, polished enough for every day.