Pre-Owned 2026 GMC Sierra 2500HD AT4 For Sale Fond du Lac, WI

2026 GMC Sierra 2500HD AT4 4x4 Onyx Black | Lenz Truck CenterThe 2026 GMC Sierra 2500HD AT4 4x4 Crew Cab delivers capability, comfort, and advanced technology in a package designed for serious work and refined daily driving. Finished in Black with a full 6.75-foot box, this truck combines the power of a Duramax 6.6L V8 Turbodiesel engine with the sophistication you expect from GMC's premium lineup.This AT4 arrives equipped with an impressive array of features engineered for both performance and convenience:- AT4 PREMIUM PLUS PACKAGE- TECHNOLOGY PACKAGE- GOOSENECK/5TH WHEEL PREP PACKAGE- 4SB EQUIPMENT GROUP- GOODYEAR WRANGLER DURATRAC LT295/65R20 TIRES- 360-DEGREE CAMERA SYSTEM WITH REAR CAMERA MIRROR- ADAPTIVE CRUISE CONTROL WITH FORWARD COLLISION ALERT AND AUTOMATIC EMERGENCY BRAKING- HEATED AND COOLED FRONT BUCKET SEATS WITH DUAL CLIMATE ZONES- HEATED SECOND ROW SEATS AND HEATED STEERING WHEEL- APPLE CARPLAY AND ANDROID AUTO WITH TOUCHSCREEN CONTROLS AND VOICE RECOGNITION- BOSE PREMIUM 7-SPEAKER SOUND SYSTEM WITH SIRIUSXM AND 360L TRIAL SUBSCRIPTION- MOONROOF AND POWER SLIDING REAR WINDOW- 20-INCH HIGH GLOSS BLACK ALUMINUM WHEELS- INTEGRATED BRAKE CONTROLLER WITH TRAILER VIEWING SOFTWARE AND PROVISIONS- SPRAY-IN BED LINER WITH GMC LOGO- KEYLESS ACCESS WITH PUSH BUTTON START AND FACTORY REMOTE START- OFF-ROAD STEPS AND CORNERSTEP FOOTWELLS WITH X31 OFF-ROAD PACKAGE SUSPENSIONThe cabin welcomes you with dual power leather seats featuring 10-way power adjusters with lumbar support and memory settings. Climate control reaches every occupant with front and rear automatic temperature management. The heads-up display keeps critical information visible without breaking focus from the road, while steering wheel controls and voice recognition put convenience at your fingertips. Wireless charging and multiple USB ports ensure your devices stay connected throughout your journey.Safety technology is comprehensive with blind-spot monitors, trailer side blind zone alerts, ultrasonic front and rear park assist, and lane departure warning. The Gooseneck/5th Wheel Prep Package and in-vehicle trailering system app make towing straightforward and controlled. Hill descent control, electronic stability control, and the 2-speed active transfer case handle challenging terrain with confidence.This Sierra 2500HD stands ready for whatever demands you place on it—whether that means a full day at the job site or an evening of refined comfort on the highway. The AT4 Preferred and Premium Plus packages provide genuine capability enhancements, while factory warranties protect your investment with 36 months/36,000 miles of bumper-to-bumper coverage and 60 months/60,000 miles of powertrain protection.VIEW OUR COMPLETE INVENTORY OF AROUND 800 VEHICLES AT www.LENZTRUCK.com .All of our vehicles are Lenz Certified by passing a rigorous safety inspection by our certified technicians. Each vehicle is prepped cosmetically and mechanically and ready to be delivered! We can ship your truck anywhere in the United States. Contact us to find out why Lenz Truck Center is selling a lot of trucks in a very different way. EXPECT TO BE IMPRESSED! We attempt to ensure every effort is made to assure the accuracy of these ads, however, errors may occur. We will do our best to keep all information current and accurate; however the dealership should be contacted for final pricing and availability. Every feature listed on the Factory window sticker may not be available. All prices are plus any applicable state taxes and service fees. Tax, title, license, service fee, and shipping are extra if/when applicable. May not apply on all transactions, ask Sales Staff for Details.