The 2025 GMC Sierra 2500HD AT4 is a commanding diesel-powered work truck built for demanding tasks and premium comfort. With its formidable Duramax 6.6L V8 Turbodiesel engine paired to a 10-speed automatic transmission, this 4WD crew cab delivers the power and capability you need. Finished in crisp White with a Jet Black and Kalahari leather interior, this Sierra 2500HD combines rugged functionality with refined appointments.- Duramax 6.6L V8 Turbodiesel with 10-speed automatic transmission- 4WD with 2-speed active transfer case and off-road suspension- Heated and ventilated leather front seats with 10-way power adjusters- Bose premium 7-speaker sound system with SiriusXM satellite radio and Apple CarPlay/Android Auto- GMC MultiPro tailgate with integrated step lights and spray-on bedliner- Advanced safety features: automatic emergency braking, surround camera system, rear cross-traffic alert, and trailer side blind zone alert- Lane departure warning, forward collision alert, and ultrasonic park assist- Wireless charging and dual USB charging ports- X31 off-road package with hill descent control- Gooseneck/5th wheel prep packageBuilt to work as hard as you do, this AT4 combines serious capability with premium amenities. The X31 off-road package and gooseneck prep make it ready for any challenge, while heated seats, wireless charging, and premium audio keep you comfortable on every journey. Come see this impressive Sierra 2500HD today and experience the perfect balance of power and refinement.