OER Parts offers a wide selection of Cooling System Components for your 1981 GMC K2500 Suburban. OER Parts offers 1981 GMC K2500 Suburban Hose Clamps, 1981 GMC K2500 Suburban Heater Hose Clamps, 1981 GMC K2500 Suburban Radiator Hose Clamps, 1981 GMC K2500 Suburban Tower Style Hose Clamps, 1981 GMC K2500 Suburban Heat-Shrink Hose Clamps, 1981 GMC K2500 Suburban Corbin Style Hose Clamps, and 1981 GMC K2500 Suburban Radiator & Heater Hose Clamp Set.