The 2025 GMC Sierra SLT Crew Cab 2500HD combines powerful performance and premium features. Powered by a 6.6L Duramax turbo diesel engine and paired with a 10-speed Allison transmission, it offers exceptional towing capability and strength. The standard SLT features are elevated with the added Premium Package and a power sunroof, enhancing both comfort and style. Towing is made easier with the Gooseneck/5th Wheel prep package and trailer tire pressure monitors. The added 20" aluminum rims complete the bold, rugged look of this capable truck. Perfect for both work and play, the Sierra SLT is ready for any challenge. It's easy to do business here!