GMPartsGiant.com offers the wholesale prices for genuine 2002 GMC Sonoma 4WD parts. Parts like Wiring Harness Locator are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.2L Flex, 6 Cyl 4.3L. Model Code: 4 DOOR, PICKUP, PICKUP EXTENDED CAB.