1979 GMC K3500 Hi-Blower Relay;. 1980 GMC K3500 Hi-Blower Relay;. 1981 GMC K3500 Hi-Blower Relay;. 1982 GMC K3500 Hi-Blower Relay;. HVAC Blower Relay. HVAC Relay. Standard Relay. IMPORTANT: To confirm that this part fits your vehicle, enter your vehicles Year, Make, Model, Trim and Engine in the Compatibility Table.
