The 2026 GMC Sierra 2500HD Denali Ultimate is a powerhouse of capability and sophistication. With its Duramax 6.6L V8 Turbodiesel engine and 10-speed automatic transmission, this truck is built to handle the toughest jobs with ease. - Downpour Metallic Blue exterior - Dual 220-amp primary and 170-amp auxiliary alternators - Gooseneck/5th Wheel Prep Package - Preferred Equipment Group 5SB - Technology Package - X31 Off-Road Package This Sierra Denali Ultimate is equipped with an impressive array of premium features that elevate the driving experience: - Bose Premium Series 12-speaker audio system - SiriusXM with 360L trial subscription - Heads-up display - Push-button start - Remote vehicle starter system - Wireless charging - Wireless phone projection - Trailer Cam provisions and trailer viewing software - Ventilated front seats - Heated rear outboard seats - Power sunroof Designed for both work and play, the 2026 GMC Sierra 2500HD Denali Ultimate blends rugged capability with uncompromising luxury. Experience the pinnacle of pickup truck refinement.