2024 GMC Sierra 2500HD Denali Onyx Black Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4D Crew CabGMC Certified Pre-Owned Details:* 24 months/24,000 miles (whichever comes first) Certified Pre-Owned Scheduled Maintenance Plan and 3 days/150 miles (w...