The ACDelco GM Original Equipment Trailer Tow Relay functions as an electro-mechanical switch containing a coil and set of connection points, and is a GM-recommended replacement for your vehicle's original components. This trailer tow relay provides a variety of control functions for a vehicle's trailer brake system, and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
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Item# : SPM9275949729
Model # : 20904439