2026 GMC Sierra 2500 HD SLT

The foundation for towing is the Gooseneck/Fifth Wheel Prep Package — the hitch platform is already in place to accept a gooseneck or fifth-wheel hitch, so you can put the truck to work the same week you drive it home. Backing that up is the ProGrade Trailering System from the Preferred Equipment Group 4SA, and the Sierra HD Pro Safety Plus Package adds the full camera and sensor suite: HD Surround Vision, a bed-view camera with two trailer camera provisions, Trailer Cam provisions and trailer viewing software, Trailer Side Blind Zone Alert, and Ultrasonic Front and Rear Park Assist.

The exhaust brake helps manage speed on long descents when loaded. Adaptive Cruise Control, from the SLT Preferred Package, rounds out a trailering setup that covers nearly every scenario.

The X31 Off-Road and Protection Package and X31 Off-Road Package add 20-inch bright-face wheels with dark painted pockets, LT275/65R20 all-terrain tires, Hill Descent Control, skid plates, and an off-road suspension tune — useful on dirt roads, farm lanes, and job sites whether you're towing or not. The spray-on bedliner with GMC logo and all-weather floor liners from those packages mean the truck is already protected where it matters.

Six rectangular chromed tubular assist steps from the SLT Premium Package make entry and exit easy regardless of what's on your boots.

Inside, the SLT Convenience Package delivers ventilated driver and front passenger seats alongside heated front seating — the SLT Preferred Package extends heating to the second-row outboard positions. Wireless charging, two charge/data USB ports inside the center console, and the Bose Premium 7-Speaker Sound System with RichBass woofer make the cab a comfortable place to be.

The 13.4-inch diagonal GMC Infotainment display with Google built-in apps, wireless Apple CarPlay and Android Auto, a mobile hotspot, and the remote vehicle starter system from the Preferred Equipment Group 4SA handle the technology side. A Safety Alert Seat, forward collision mitigation, Rear Cross Traffic Alert, and front rain-sensing wipers complete the driver-assistance picture.

The GMC MultiPro Tailgate, engine block heater, winter grille cover, and a 120-volt bed-mounted power outlet are also on the sticker.

Napleton Chevrolet Buick GMC sits on Kellom Rd. in Beaver Dam — about 45 minutes from Madison, an hour from Milwaukee, and 35 minutes from Fond du Lac, making it a straightforward drive for shoppers from Columbus and Watertown as well. The Napleton family has operated dealerships for more than 80 years, and there's no pressure here: look the truck over, bring your trailer, and decide on your own terms.