GMPartsGiant.com offers the wholesale prices for genuine 2008 GMC Yukon XL 1500 Denali AWD parts. Parts like Air Distribution System/Front Ducts are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 6.2L. Model Code: YUKON XL/DENALI XL/ESCALADE ESV.