Meet the 2021 GMC Sierra 1500 AT4—a truck engineered for drivers who demand capability, comfort, and advanced technology working together seamlessly.- Power Sunroof- HD Surround Vision with Trailer View Camera Provisions- Rear Camera Mirror- Multicolor 15" Diagonal Head-Up Display- Premium Bose 7-Speaker Sound System with Navigation- Adaptive Cruise Control- Automatic Emergency Braking with Safety Alert Seat- Lane Keep Assist with Lane Departure Warning- Heated and Ventilated Front Seats- 10-Way Power Driver Seat with Lumbar Support- Spray-On Pickup Bed Liner with AT4 Logo- ProGrade Trailering System with Integrated Trailer Brake Controller- Wireless Charging- Auto-Locking Rear Differential- IntelliBeam Automatic High Beam ControlThis truck combines a 3.0L turbocharged diesel engine with a 10-speed automatic transmission and standard 4WD, delivering 22 city and 26 highway MPG—impressive efficiency for a vehicle of this caliber. The gray exterior presents a sharp, professional appearance that maintains its appeal in any setting.The AT4 package positions this Sierra as a premium off-road capable pickup without sacrificing on-road refinement. You'll find the cabin refined with perforated leather-appointed seating, dual-zone automatic climate control, and a heated steering wheel. The floor-mounted center console and premium floor liners provide both storage and durability for work or weekend adventures.Technology surrounds you with confidence. The 8" digital driver information center keeps critical data at your fingertips, while SiriusXM with 360L connectivity keeps you entertained across any journey. Apple CarPlay and Android Auto integration means your smartphone connects naturally to the GMC infotainment system. Multiple USB ports, a 120-volt bed-mounted outlet, and wireless charging throughout the cabin ensure your devices remain powered.Safety systems work actively to protect you and your passengers. Forward collision alert, automatic emergency braking, front pedestrian braking, lane departure warning, rear cross traffic alert, and ultrasonic park assist all contribute to confident driving. The trailering package includes hitch guidance with hitch view—displayed through your cameras—and an in-vehicle trailering app to support towing operations.The truck bed itself is equipped with a spray-on liner bearing the AT4 logo, red recovery hooks for off-road situations, and a power sliding rear window with defogger. LED cargo area lighting illuminates the bed for evening work, while the ProGrade trailering system with integrated brake controller manages towing duties with precision.This 2021 Sierra AT4 represents a substantial investment in a truck built to perform. Come see it in our showroom and experience the command this vehicle offers.