GMPartsGiant.com offers the wholesale prices for genuine 2008 Chevrolet Colorado 4WD parts. Parts like Sunroof are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.9L, 5 Cyl 3.7L. Model Code: CREW CAB, EXTENDED CAB, EXTENDED LENGTH, PICKUP.