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ACDelco has over 100 years of experience in the automotive industry and is a brand of GM Customer Care and Aftersales, a division of General Motors. ACDelco employs a two- or three-tiered distribution model, utilizing a network of appointed wholesale distributors to service independent installers, ACDelco independent service centers, retail and fleet customers.
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Q:what does this part do?
A:A blower relay unit has different paths for the electricity to flow for the slower fan speeds. I say this because some blower motor relays include the high speed relay and the resister unit. In that type of system, removing the relay keeps the blower fan (heater or air conditioner air movement) from occurring. It is very typical for these blower control devices to fail in a GM car and for the wiring to also be hurt in a GM truck. Visual inspection of the relay/resister that is located above the front passenger's feet will help you decide how much damage you have, as when the relay/resister is removed you can see heat damage to the faulty ones. Many of these are held in by bolts that have 5.5 mm heads.
Q:Is this part (#15-8189) the relay for the air conditioner?
A:This is the relay for the blower motor.