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

The 2026 GMC Sierra 1500 AT4 is engineered for those who demand uncompromising off-road capability wrapped in premium comfort. With its aggressive AT4 stance, powerful V8 performance, and advanced trail-ready technology, this truck is built to go further — confidently and comfortably. 

Performance & Capability 

• Engine: 6.2L ECOTEC3 V8 delivering exhilarating power, strong torque, and confident acceleration 

• Transmission: Smooth-shifting 10-speed automatic for responsive performance on-road and off 

• Drivetrain: Autotrac® 4-Wheel Drive with a two-speed transfer case for maximum traction in changing terrain 

• Rear Axle Ratio: 3.23 for a balanced blend of towing capability and everyday drivability 

• Off-Road Suspension: AT4 off-road suspension package tuned for durability, articulation, and trail confidence 

• Skid Plates: Underbody protection for critical components when venturing off the pavement 

• Automatic Locking Rear Differential: Improved traction in mud, snow, sand, or rock 

• Hill Descent Control: Controlled braking for confident descents on steep or uneven terrain 

• Trailering Capability: Integrated trailer brake controller, Hitch View, hitch guidance, and in-vehicle trailering app 

Exterior Styling & Utility 

• AT4 Exterior Design: Bold black accents, muscular body lines, and a commanding stance 

• Wheels & Tires: 20" machined aluminum wheels with carbon grey accents paired with all-terrain tires 

• Exterior Colour: Summit White — clean, rugged, and timeless 

• LED Lighting: LED headlamps, fog lamps, daytime running lamps, tail lamps, and cargo bed lighting 

• GMC MultiPro Tailgate: Six-function tailgate for easier loading, step access, and jobsite versatility 

• Spray-On Bedliner: Durable protection for hauling tools, gear, or adventure equipment 

• Bed Utility: 120V bed-mounted power outlet and integrated cargo box lighting 

• Red Front Recovery Hooks: Functional off-road hardware with signature AT4 style 

• Perimeter Lighting: Illuminates the truck’s surroundings for added nighttime confidence 

Interior Comfort & Convenience 

• Seating: Front bucket seats with power-adjustable driver and passenger seating and memory settings 

• Heated & Ventilated Front Seats: Comfort in every season 

• Heated Rear Outboard Seats: Premium comfort for second-row passengers 

• Heated Steering Wheel: Ideal for cold-weather driving 

• Interior Theme: Jet Black with Kalahari accents — rugged sophistication throughout the cabin 

• Power Sliding Rear Window: Enhanced airflow and rear visibility 

• Rear Seat Storage Package: Practical space for tools, gear, or daily essentials 

• Dual-Zone Automatic Climate Control: Personalized comfort for driver and front passenger 

• Remote Start & Push-Button Start: Convenience at your fingertips 

Technology & Infotainment 

• 13.4" GMC Premium Infotainment Touchscreen: Google Built-In with navigation, voice control, and seamless connectivity 

• 12" Digital Driver Information Display: Reconfigurable, easy-to-read driving information 

• Wireless Apple CarPlay® & Android Auto™: Seamless smartphone integration 

• Wireless Charging Pad: Keeps devices powered without clutter 

• Bose® Premium Audio System: Rich, immersive sound for every drive 

• 15" Multicolour Head-Up Display: Key driving data projected directly in your line of sight 

• HD Surround Vision & Bed View Camera: Enhanced visibility for parking, towing, and trail maneuvering 

Safety & Driver Assistance 

• GMC Pro Safety: Advanced driver-assistance technologies designed for confidence and control 

• Forward Collision Alert & Automatic Emergency Braking 

• Lane Keep Assist with Lane Departure Warning 

• Front & Rear Park Assist: Added confidence in tight spaces 

• Rear Cross Traffic Braking & Rear Pedestrian Alert 

• Trailer Side Blind Zone Alert: Extra awareness when towing 

• Adaptive Cruise Control: Maintains safe following distances on the highway 

• Teen Driver Mode & Buckle-to-Drive: Encourages responsible driving habits 

From rugged trails to long highway drives, the 2026 GMC Sierra 1500 AT4 delivers powerful V8 performance, trail-rated hardware, and premium refinement. It’s a truck built for drivers who push limits, embrace adventure, and expect comfort wherever the road — or trail — leads.