OER Parts offers a wide selection of Body Components for your 1979 GMC All Models. OER Parts offers 1979 GMC All Models Wiper Components, 1979 GMC All Models Washer Hoses & Tubes, 1979 GMC All Models Washer Jars and Caps, 1979 GMC All Models Washer Nozzles, 1979 GMC All Models Washer Pumps, 1979 GMC All Models Wiper Arms, 1979 GMC All Models Wiper Blades & Inserts, and 1979 GMC All Models Wiper Linkages.