GMPartsGiant.com offers the wholesale prices for genuine 2004 Chevrolet Tahoe 4WD parts. Parts like Engine Assembly-Front Cover, Oil Pump, Pan & Related Parts 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. Model Code: 4 DOOR 1/2 TON.