This 2025 GMC Sierra 2500HD AT4X in Thunderstorm Gray commands the road with its imposing presence and serious capability. Built for those who demand both power and refinement, this diesel-powered workhorse delivers a 6.6L V8 Turbocharged engine paired with a 10-speed automatic transmission and four-wheel drive, ready for any terrain or task. With its comprehensive suite of advanced features and premium appointments, this Sierra AT4X is engineered to exceed expectations whether on the job or the open highway. - 6.6L V8 Diesel Turbocharged engine with 10-speed automatic transmission - 4WD with 2-speed active transfer case and hill descent control - Gooseneck/5th wheel prep package with hitch guidance and trailer camera provisions - Engine block heater and dual alternators (220-amps primary, 170-amps auxiliary) - Premium Bose 12-speaker audio system with SiriusXM 360L and wireless phone projection - Heated and ventilated leather-trimmed seats with 16-way power adjusters - Advanced trailering technology including in-vehicle app, tire pressure monitors, and HD surround vision - Automatic emergency braking, forward collision alert, and rear cross-traffic alert - LED lighting throughout with 15-inch multicolor head-up display - 18-inch machined wheels with spray-on bedliner and protective rear wheelhouse liners This truck shows 60,374 miles and arrives ready to work or play. Every detail reflects GMC's commitment to capability and comfort, from the remote vehicle starter and wireless charging to the premium floor liners and integrated trailering systems that make towing effortless. Visit our showroom to experience the commanding presence and advanced engineering of this Sierra AT4X firsthand.