This Napa BR474 Blower Motor Resistor is a must-have for those who own a 2002-2006 Cadillac Escalade and some other Chevy/GM vehicles. It is designed to regulate the speed of your car's blower motor and ensure efficient operation of its heating, ventilation, and air conditioning system. New and unused, the box has some age to it, the part is very clean and ready to install.