This 2021 GMC Sierra 1500 AT4 comes equipped with the following features and benefits: - 3.0L Duramax Diesel Turbocharged Engine with 277 hp and 460 lb-ft of torque - Power Sunroof - Technology Package with HD Surround Vision, Rear Camera Mirror, Bed View Camera, and 15"" Multicolor Head-Up Display - AT4 Premium Package with LT275/65R18C All-Terrain Tires and AT4 High Clearance Step - Driver Alert Package II with Adaptive Cruise Control, Lane Keep Assist, Automatic Emergency Braking, and IntelliBeam - CarbonPro Carbon Fiber Composite Bed with Spray-On Liner - Premium Bose 7-Speaker Audio System with SiriusXM 360L - GMC Premium Infotainment System with Navigation - Heated and Ventilated Front Seats with 10-Way Power Adjusters and Lumbar Support - Multicolor Head-Up Display with 8"" Digital Driver Information Center - ProGrade Trailering System with Integrated Trailer Brake Controller - Wireless Charging and 4G LTE Wi-Fi Hotspot - Rear Underseat Storage and Keyless Open & Start The 2021 Sierra 1500 AT4 represents the pinnacle of capable truck design, engineered to handle both everyday driving and demanding work. The turbocharged diesel engine delivers substantial torque, making it efficient for hauling, towing, and navigating varied terrain. The 4WD system combined with an off-road suspension ensures this truck performs reliably whether you're on highway or backroad. Inside the cabin, you'll find a thoughtfully appointed environment that balances comfort with functionality. The heated and ventilated front seating keeps you comfortable in any season, while the premium audio system transforms every drive into an engaging experience. The multicolor head-up display keeps critical information within your line of sight, reducing distractions during operation. Technology integration is comprehensive throughout this AT4. The surround vision cameras provide multiple perspectives around the truck during parking and low-speed maneuvering. The rear camera mirror replaces traditional mirrors with a cleaner, more aerodynamic design while offering superior visibility. Navigation, smartphone integration, and SiriusXM satellite radio keep you connected and informed on every journey. The AT4 package delivers genuine capability enhancements beyond appearance. The high-clearance step, all-terrain tires, and reinforced suspension components work together to handle rough conditions confidently. The spray-on bed liner with AT4 branding protects your cargo area while the CarbonPro composite bed resists rust and denting better than traditional steel. Safety and driver assistance features throughout this truck reflect modern standards. Forward collision alert, automatic emergency braking, lane keep assist, and pedestrian braking work together as your co-pilot. The safety alert seat provides tactile warnings when sensors detect potential hazards, giving you multiple ways to stay aware. Larson Automotive Group has been serving members of the community since 1953 and would love to make you a part of the family: Free Lifetime Powertrain Warranty $1,000 Additional Trade in Guarantee Lifetime Free Car Washes 5 Day Exchange Policy Free Loaner Car with Service