OER Parts offers a wide selection of Cooling System Components for your 1978 GMC C15 Suburban. OER Parts offers 1978 GMC C15 Suburban Hose Clamps, 1978 GMC C15 Suburban Heater Hose Clamps, 1978 GMC C15 Suburban Radiator Hose Clamps, 1978 GMC C15 Suburban Tower Style Hose Clamps, 1978 GMC C15 Suburban Heat-Shrink Hose Clamps, 1978 GMC C15 Suburban Corbin Style Hose Clamps, and 1978 GMC C15 Suburban Radiator & Heater Hose Clamp Set.