OER Parts offers a wide selection of Body Components for your 1979 GMC All Models. OER Parts offers 1979 GMC All Models Wiper Motors, 1979 GMC All Models Wiper Motor Grommet, 1979 GMC All Models Wiper Motor To Firewall Seal, 1979 GMC All Models Wiper Motor Harness, 1979 GMC All Models Wiper Motor Shroud Gasket, 1979 GMC All Models Wiper Motor Cover, and 1979 GMC All Models Wiper Motor Mounting Hardware.