GMPartsGiant.com offers the wholesale prices for genuine 2008 GMC Envoy 2WD exc Denali parts. Parts like Wiring Harness Fuel Injector are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.2L, 8 Cyl 5.3L. Model Code: 4 DOOR.