HVAC Blower Motor Resistor. 1988 GMC C3500 w/ Heavy Duty Heater; | w/ AC;. 1989 GMC C3500 w/ Heavy Duty Heater; | w/ AC;. 1990 GMC C3500 w/ AC;. 1991 GMC C3500 w/ AC;. 1992 GMC C3500 w/ AC;. IMPORTANT: To confirm that this part fits your vehicle, enter your vehicles Year, Make, Model, Trim and Engine in the Compatibility Table.
