Used 2025 GMC Sierra 1500 AT4

The 2025 GMC Sierra 1500 AT4 combines premium comfort, advanced diesel efficiency, and authentic off-road capability into one ruggedly refined pickup. Finished in striking Onyx Black and equipped with GMC’s purpose-built AT4 enhancements, this Sierra is engineered to tackle challenging terrain while delivering exceptional comfort, technology, and versatility for everyday life. 

Performance & Capability 

• Engine: Duramax® 3.0L Turbo-Diesel delivering impressive torque, outstanding efficiency, and confident towing capability 

• Transmission: Smooth-shifting 10-Speed Automatic Transmission with Electronic Precision Shift 

• Drivetrain: Autotrac® Two-Speed Four-Wheel Drive (4WD) system for confident traction in all conditions 

• Off-Road Suspension Package tuned specifically for enhanced trail performance and ride control 

• Automatic Locking Rear Differential helps maximize traction on loose or uneven surfaces 

• Hill Descent Control provides added confidence on steep grades and technical terrain 

• Skid Plates help protect critical underbody components during off-road adventure 

• Heavy-Duty Air Filter designed for demanding driving environments 

• Dual Exhaust System adds both performance and distinctive styling 

• 3.23 Rear Axle Ratio optimized for towing capability and fuel efficiency 

• Integrated Trailering Equipment with Trailer Brake Controller, Hitch Guidance, Hitch View, Trailer Camera Provisions, and In-Vehicle Trailering App 

• FlexRide Drive Mode System adjusts performance characteristics for varying road and terrain conditions 

Winter & Weather Comfort 

• Heated Front Seats provide exceptional comfort during cold-weather driving 

• Ventilated Front Seats help keep occupants cool during warmer months 

• Heated Rear Outboard Seats offer premium comfort for second-row passengers 

• Heated Steering Wheel keeps hands warm on chilly mornings 

• Remote Vehicle Start allows the cabin to be pre-conditioned before you enter 

• Dual-Zone Automatic Climate Control maintains personalized comfort throughout the cabin 

• Engine Block Heater supports reliable starts during harsh winter conditions 

• Rain-Sensing Windshield Wipers automatically respond to changing weather conditions 

• Deep-Tinted Glass enhances privacy and helps reduce interior heat buildup 

• Premium Floor Liners with removable carpet inserts provide year-round interior protection 

Interior Comfort & Convenience 

• Premium Front Bucket Seats finished in Jet Black and Kalahari-appointed interior trim 

• Power Driver and Front Passenger Seats with personalized comfort adjustments 

• Driver Memory Settings for seat and mirror preferences 

• Power Tilt and Telescopic Steering Column for an ideal driving position 

• Wireless Charging Pad keeps compatible devices powered without cables 

• Power Sliding Rear Window enhances airflow and convenience 

• Rear Seat Storage Package provides versatile cargo organization solutions 

• Keyless Open and Push-Button Start for effortless entry and operation 

• Universal Home Remote adds convenience for compatible garage and gate systems 

• Multiple USB Ports throughout the cabin for passengers and devices 

• 120-Volt Power Outlets in both the cabin and cargo bed for worksite and recreational use 

• Power Sunroof adds an open-air feel and additional natural light 

Technology & Connectivity 

• 13.4" GMC Premium Infotainment Touchscreen with Google Built-In Compatibility and Navigation Capability 

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

• 12" Reconfigurable Digital Driver Information Display with customizable vehicle information 

• Bose® Premium Audio System delivering rich, immersive sound throughout the cabin 

• Wireless Phone Projection eliminates cable clutter while staying connected 

• Bluetooth® Connectivity and Voice Command functionality for hands-free convenience 

• Available Wi-Fi Hotspot Capability keeps passengers connected on the go 

• Steering Wheel-Mounted Audio Controls for easy access to entertainment features 

Safety & Driver Assistance 

• GMC Pro Safety suite of advanced driver-assistance technologies 

• Forward Collision Alert with Automatic Emergency Braking 

• Front Pedestrian Braking for enhanced awareness in busy environments 

• Adaptive Cruise Control for greater comfort on long drives 

• Lane Keep Assist with Lane Departure Warning 

• HD Surround Vision provides a comprehensive view around the vehicle 

• Front and Rear Park Assist for easier maneuvering in tight spaces 

• Rear Cross Traffic Braking adds confidence when reversing 

• Rear Pedestrian Alert enhances awareness behind the truck 

• Trailer Side Blind Zone Alert improves visibility while towing 

• Following Distance Indicator helps encourage safer driving habits 

• Driver Safety Alert Seat provides intuitive safety notifications 

• Teen Driver Mode and Buckle-to-Drive features promote responsible driving habits 

Exterior Styling & Utility 

• Exterior Colour: Onyx Black — bold, sophisticated, and unmistakably aggressive 

• 20" Machined Aluminum Wheels with Carbon Grey Metallic Accents create a commanding stance 

• Distinctive AT4 Styling with exclusive badging and premium off-road design cues 

• LED Fog Lamps and IntelliBeam® Automatic High Beams improve visibility in varying conditions 

• Red Front Recovery Hooks provide functional off-road capability and signature AT4 character 

• GMC MultiPro Tailgate offers exceptional versatility for loading, unloading, and cargo access 

• EZ Lift Power Lock and Release Tailgate enhances convenience and usability 

• Spray-On Bedliner helps protect the cargo box from scratches and wear 

• LED Cargo Bed Lighting improves visibility when loading after dark 

• Rear Wheelhouse Liners add durability and protection to the pickup box 

• Sport Steps provide easier cabin access while complementing the truck’s rugged appearance 

• Perimeter Lighting enhances visibility around the vehicle at night 

• Active Aero Shutters help improve efficiency without compromising capability 

Whether you're towing a trailer, exploring remote trails, or tackling everyday tasks, the 2025 GMC Sierra 1500 AT4 delivers diesel-powered capability, premium comfort, and authentic off-road confidence. It's the perfect combination of rugged adventure, advanced technology, and refined craftsmanship for drivers who expect their truck to do it all.