GMPartsGiant.com offers the wholesale prices for genuine 2004 GMC Yukon XL 1500 4WD parts. Parts like Entertainment 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 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L. Model Code: 1/2 TON.