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The blower resister is located under the dash in the passanger footwell. You will have to remove the shroud that extends along the underside of the dash. You will see the blower motor and the wiring harness, the resistor is in front of the blower. Just disconnect the harness from the resistor and two screws and the resistor should drop out. If the resistor is original eqipment the replacement from GM is slightly different. You don't need the plastic retaining part when you put the new one in. Expect some problems putting the shroud back in place... Hope that helps..

I had no high blower and after checking harness with a multimeter had over 14 volts at the plug. Resistor/relay faulty. It is held with two 7/32" head screws and had to unplug two harnesses (carefully with small screw driver, the harnesses are held in with clips that are part of the plug). At my napa store there was two types of resistors, I removed old one first to match. Reverse procedure to install.

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Q: Where is the blower resistor located on a 2003 Chevy Silverado and how do you replace it?
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