GMPartsGiant.com offers the wholesale prices for genuine 2011 GMC Yukon XL 1500 4WD parts. Parts like Exhaust System are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.3L Flex. Model Code: YUKON XL/DENALI XL/ESCALADE ESV.