2024 GMC SIERRA 3500HD AT4 CREW CAB 4WD DURAMAX DIESEL The Certified 2024 GMC Sierra 3500HD AT4 Crew Cab 4WD at Stillwell Ford in Hillsdale, MI combines serious heavy-duty diesel capability with premium AT4 comfort, advanced trailering equipment, and modern technology. Powered by the 6.6L Duramax Turbo-Diesel V8 paired with an Allison 10-speed automatic transmission, this Sierra features the AT4 Premium Plus Package, Technology Package, Gooseneck/5th Wheel Package, Snow Plow Prep / Camper Package, and Trailering Package. The 6.6L Duramax Turbo-Diesel V8 and Allison transmission provide the foundation for demanding towing, hauling, work, and recreational use. An auto-locking rear differential, integrated trailer brake controller, Gooseneck/5th Wheel Package, and Trailering Package add valuable factory towing capability, while the Snow Plow Prep / Camper Package expands the truck's heavy-duty versatility. The AT4 combines rugged capability with premium equipment, including power-retractable assist steps, power sunroof, and GMC's MultiPro Tailgate. Inside, 10-way power front bucket seats, heated and ventilated front seats, heated rear outboard seats, driver-seat and mirror memory, heated steering wheel, and dual-zone climate control create a cabin designed to remain comfortable whether this Sierra is working locally or covering serious highway miles. Technology includes a 13.4-inch GMC Premium Infotainment System, Google Built-In compatibility, wireless Apple CarPlay, wireless Android Auto, Bose Premium Sound System, and 12.3-inch Driver Information Center. Driver-assistance and visibility technology includes Adaptive Cruise Control, Rear Camera Mirror, Head-Up Display, HD Surround Vision, Trailer Side Blind Zone Alert, Rear Cross Traffic Alert, Forward Collision Alert, Automatic Emergency Braking, Lane Departure Warning, Front and Rear Park Assist, and Safety Alert Seat. For shoppers comparing a Certified 2024 GMC Sierra 3500HD AT4, a used Duramax diesel truck, or a premium Crew Cab 4WD heavy-duty pickup with gooseneck and fifth-wheel capability, this Sierra combines Duramax diesel power, Allison transmission performance, advanced trailering technology, and upscale AT4 comfort. Because Everything We Do Is Driven By You. Serving drivers across Southern Michigan, Northern Ohio, and Northern Indiana, Stillwell Ford in Hillsdale, MI is your destination for the 2024 GMC Sierra 3500HD. Visit us on M-99 today to take your test drive or contact our team to learn more about current lease and financing offe