The new 2021 GMC Sierra 2500 4WD Crew Cab AT4 combines rugged styling, heavy-duty capability and off-road performance into one ultimate heavy-duty truck. A durable yet refined cabin offers an exclusive AT4 interior with standard front leather seating
And when it’s time for the rugged, tough but fun stuff, it begins with the tailgate to end all tailgates. The Sierra HD offers the World’s First Six-Function GMC Multi-Pro Tailgate that helps improve accessing, loading and unloading the cargo bed. It’s standard on 2021 Sierra 1500 SLT, AT4 and Denali and most Sierra Heavy Duty models. And when you’re camping or tailgating and want to bring your music outdoors—without leaving your Sierra running. If needed, there’s the accessory MultiPro Audio System by KICKER® that’s designed to integrate into the MultiPro Tailgate. This 100-watt exterior audio system has full Bluetooth streaming capability. Automatic locking rear axle is part of the standard trailering package, with Hitch Guidance and Hitch View. The GMC ProGrade Trailering System and the Vision Camera are also standard. The Sierra HD offers beds that are long and wide to handle your biggest loads. The bed height makes for comfortable lift-in loading and is optimized for gooseneck/fifth-wheel trailer clearance. To help protect the floor, a spray-on bedliner is standard. Plus, side bed steps are standard too, for easy access, even with a gooseneck or fifth-wheel trailer hitch, and there’s a cornerstep rear bumper with large footwells.
THE NUMBERS: MSRP/From $58,600 — MPG/About 19.91 combined