GMPartsGiant.com offers the wholesale prices for genuine 2008 GMC Yukon Denali 2WD parts. Parts like Automatic Transmission Output Shaft Assembly 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, 8 Cyl 6.2L. Model Code: YUKON/DENALI/ESCALADE.