Question about 2003 Chevrolet Silverado 1500

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Replacing a/c blower resistor,for a 2003 silverdo but when pluging the plugs,it starts blowing air, the key is turn off. What is the problem?

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Sounds like a shorted hi speed blower relay..

Posted on Oct 13, 2009

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I had the same problem. I fix it my self. This is what you look for, is your a/c blower working when you turn the fan on. If a/c light come on but nut the blower fan. Then under passenger dash you will see orange plug. It's held in with 2 screws. Remove 2 screws and pull resistor out. Disconnect orange plug and look at orange plug and the resistor if burn need to replace the resistor and the orange connector. That's your problem. Now if your blower works but no power to a/c switch and you instrument nobles has no lights. Then it's a fuse check #48 and # 57 fuse that controls that Troy

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http://www.sparkys-answers.com/2009/01/2002-gmc-envoy-no-low-blower-speeds.html

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My 2002 gmc serra has a issue with the ac and heater the lights turn on but no air I hit a bump and it will turn on for a second but it stop blowing air cold or hot what could it be....


the blower motor resistor relay are bad about shorting out and melting the connector causing a loose connection and when you hit it or a bump it'll make connection and work. look under the passenger side dash and you'll see two wires coming from the blower motor. trace those two wires to a little black box with somemore wires pluged into it and try to unplug the other connector that has about five wires coming from it. turn your key on and your a/c with the blower speed set on high, try moving those five wires if the fan blows and quits, then this is the problem. you'll have to replace the resistor and the wire connector.

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your blower resistor is bad look under rt side of dash by the blower motor you will see a flat plug into a piece bolted in air box this is the resistor. the wires are bad about burning up also un plug and check that if so gm sells a replacement plug. sometimes you can clean if you caught in time

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