GMPartsGiant.com offers the wholesale prices for genuine 2009 GMC Yukon XL 1500 Denali AWD parts. Parts like Automatic Transmission Oil Cooler Pipes 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 Flex. Model Code: YUKON XL/DENALI XL/ESCALADE ESV.