Iridium Metallic 2015 GMC Yukon SLT 4WD 6-Speed Automatic Electronic with Overdrive EcoTec3 5.3L V8 4WD. Awards: * JD Power Automotive Performance, Execution and Layout (APEAL) Study * 2015 KBB.com Brand Image Awards Reviews: * Strong V8 power; stout towing capacity; available nine-person seating capacity; extremely quiet highway ride; impressive interior quality. Source: Edmunds * If you need no-compromises hauling and towing ability, along with a no-compromises, first-rate interior, the 2015 GMC Yukon and Yukon XL are just the ticket. That goes double for the high-end Denali models. Source: KBB.com.