Your GMC dealership isn't the only place to locate the highest quality replacement parts for your Sierra 2500 HD. It's not all the time that you discover you need a replacement Blower Motor Regulator Resistor to fix your automobile. Anyone who operates a GMC knows that when it comes to repairing their vehicle only the highest quality replacement parts will do. GMC car, truck, or SUV enthusiasts have grown accustomed to a certain level of dependability when driving their Sierra 2500 HD around town.
Multi-speed climate control has been around for decades, and is a convenience we all take for granted. The small device that allows your heater to project air at different speeds is your heater blower resistor. Directly connected to your blower switch, your GMC Sierra 2500 HD blower motor resistor modulates the resistance applied to the circuit that handles the load of the blower motor. When you command your GMC Sierra 2500 HD heater to blow on "High", it lowers the resistance so that all the amperage reaches the blower. Conversely, at the lowest blower setting the circuit is running high resistance so fewer amps go to the blower motor.
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Resistor includes pigtail adapter to attach this new-style 5-pin resistor to older 3-pin vehicle connector. Installation in certain vehicles will require this wiring adapter and reuse of original 2-pin blower motor connector (minor splicing is required).