OER Parts offers a wide selection of Body Components for your 1989 GMC Truck. OER Parts offers 1989 GMC Truck Wiper Components, 1989 GMC Truck Washer Hoses & Tubes, 1989 GMC Truck Washer Jars and Caps, 1989 GMC Truck Washer Nozzles, 1989 GMC Truck Washer Pumps, 1989 GMC Truck Wiper Arms, 1989 GMC Truck Wiper Blades & Inserts, and 1989 GMC Truck Wiper Linkages.