Used 2021 GMC Sierra 1500 AT4

The 2021 GMC Sierra 1500 AT4 Crew Cab blends rugged off-road capability, premium comfort, and professional-grade performance into one bold and versatile pickup. Purpose-built for adventure while refined enough for everyday driving, the AT4 stands out with its lifted stance, aggressive styling, and advanced technology—ready for work, play, and everything in between. 

Performance & Capability 

• Engine: 5.3L ECOTEC3 V8 delivering impressive horsepower, strong towing capability, and Dynamic Fuel Management efficiency 

• Transmission: Smooth and responsive 10-speed automatic transmission for optimized power delivery 

• Drivetrain: Autotrac® Two-Speed 4-Wheel Drive system for confident traction on varying terrain 

• Off-Road Suspension: Factory AT4 off-road suspension with a 2-inch lift for enhanced ground clearance 

• Rear Differential: Automatic locking rear differential for increased traction in challenging conditions 

• Hill Descent Control helps maintain confidence on steep grades and uneven trails 

• Skid Plates provide added protection when venturing off the beaten path 

• High-Capacity Air Cleaner, Engine Oil Cooler, and Heavy-Duty Transmission Cooler support demanding workloads 

• FlexRide Drive Mode System allows customization of vehicle performance based on road and terrain conditions 

• Trailering Package equipped for towing confidence and versatility 

Trailering & Utility 

• Integrated Trailer Brake Controller for smoother, more controlled towing 

• Advanced Trailering System with built-in towing assistance features 

• Hitch Guidance with Hitch View simplifies trailer connections and maneuvering 

• Rear Vision Camera assists when backing up or aligning a trailer 

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

• GMC MultiPro Tailgate offers multiple configurations for loading, unloading, and cargo access 

• Bed-Mounted 120V Power Outlet provides convenient power at the jobsite or campsite 

• LED Cargo Box Lighting improves visibility when loading gear after dark 

• Rear Wheelhouse Liners add durability and protection inside the bed 

Winter & Weather Comfort 

• Heated and Ventilated Front Seats for year-round comfort 

• Heated Rear Outboard Seats keep passengers comfortable in colder temperatures 

• Heated Leather-Wrapped Steering Wheel for added warmth on winter mornings 

• Remote Vehicle Start allows the cabin to be pre-heated or cooled before departure 

• Tri-Zone Automatic Climate Control ensures personalized comfort throughout the cabin 

• Rear Window Defroster improves visibility during harsh weather conditions 

• Engine Block Heater provides reliable cold-weather starting performance 

Interior Comfort & Convenience 

• Premium Front Bucket Seats with 8-Way Power Driver and Passenger Adjustments 

• Driver Memory Settings for preferred seat and mirror positions 

• Spacious Crew Cab configuration with generous rear passenger room 

• Rear Seat Storage Package provides additional secure storage solutions 

• Power Sliding Rear Window enhances ventilation and convenience 

• Full-Length Center Console with ample storage and organization 

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

• Premium All-Weather Floor Liners help protect the interior year-round 

• Auto-Dimming Rearview Mirror reduces glare during nighttime driving 

• Universal Home Remote for convenient garage and gate access 

Technology & Connectivity 

• GMC Premium Infotainment System with Navigation 

• 8-Inch Touchscreen Display with intuitive controls and smartphone connectivity 

• Wireless Charging Pad for compatible devices 

• Bose® Premium Audio System delivering rich, immersive sound quality 

• Bluetooth® Hands-Free Calling and Audio Streaming 

• Multiple USB Ports throughout the cabin for charging and connectivity 

• SiriusXM® Satellite Radio and HD Radio capability for expanded entertainment options 

• 4G LTE Wi-Fi® Hotspot Capability keeps passengers connected on the go 

• Steering Wheel-Mounted Audio and Cruise Controls for added convenience 

• Driver Information Centre provides important vehicle data at a glance 

Safety & Driver Assistance 

• HD Rear Vision Camera for improved visibility when reversing 

• Tire Pressure Monitoring System with real-time tire information 

• Comprehensive Airbag System for enhanced occupant protection 

• Teen Driver Technology encourages safer driving habits and monitoring features 

• Rear Seat Reminder helps ensure important items are not left behind 

• Advanced braking systems provide dependable stopping performance both on and off-road 

Exterior Styling & Utility 

• Exterior Colour: Dark Sky Metallic — a bold and sophisticated finish with rugged appeal 

• Signature AT4 Styling with aggressive off-road-inspired design elements 

• 20-Inch Machined Aluminum Wheels wrapped in Goodyear Wrangler Territory All-Terrain Tires 

• Distinctive Red Front Recovery Hooks showcase the truck's off-road readiness 

• LED Front Fog Lamps improve visibility in challenging conditions 

• Body-Colour Front and Rear Bumpers create a premium, integrated appearance 

• Deep-Tinted Rear Glass enhances privacy and comfort 

• Power Sunroof adds an open-air driving experience 

• Premium Exhaust Tips provide a refined finishing touch 

• CornerStep Rear Bumper allows easier access to the truck bed 

Whether you're towing a trailer, exploring remote trails, tackling demanding jobs, or cruising through the city, the 2021 GMC Sierra 1500 AT4 delivers powerful performance, premium comfort, and authentic off-road capability. It's the perfect combination of strength, technology, and adventure-ready confidence for drivers who demand more from their truck.