HVAC Blower Motor Resistor. 1975 GMC K15 w/o AC;. 1976 GMC K15 w/o AC;. 1977 GMC K15 w/o AC;. 1978 GMC K15 w/o AC;. Resistor Block. IMPORTANT: To confirm that this part fits your vehicle, enter your vehicles Year, Make, Model, Trim and Engine in the Compatibility Table.
