2021 GMC Sierra 1500 AT4 Crew Cab in Gray with a commanding 6.2L EcoTec3 V8 engine paired with a smooth 10-speed automatic transmission. Built for serious capability, this 4WD truck combines premium comfort with genuine off-road performance. With just over 65,000 miles, this Sierra remains well within its prime, offering years of reliable service ahead.- Premium Bose 7-Speaker Sound System with SiriusXM 360L- Premium GMC Infotainment System with Navigation and Apple CarPlay/Android Auto- Multicolor 15" Head-Up Display- ProGrade Trailering System with Integrated Trailer Brake Controller and Hitch Guidance- Advanced Safety: Automatic Emergency Braking, Lane Keep Assist, Rear Cross Traffic Alert, and HD Surround Vision- Heated and Ventilated Leather Front Seats with 10-Way Power Adjustment- Power Sunroof and Power Sliding Rear Window- Spray-On Pickup Bed Liner with AT4 Logo- Adaptive Cruise Control with Following Distance Indicator- Wireless Charging and 4G LTE Wi-Fi HotspotThe AT4 package delivers rugged authenticity with the TechConnect convenience you expect from a modern luxury truck. Jet Black leather with Kalahari accents creates an upscale cabin environment, while technology like the rear camera mirror, lane change alert, and in-vehicle trailering app keep you confident whether you're navigating city streets or remote trails. The heavy-duty construction—including AT4 high-clearance steps, body-color surround grille, and recovery hooks—demonstrates GMC's commitment to genuine capability.With EPA-estimated 15 city / 19 highway MPG, this Sierra delivers the power and torque truck buyers demand. Come experience the commanding presence and refined interior of this AT4 in person—this is the truck built for those who refuse to compromise between performance and premium features.