Blower keeps runing on 1999 GMC Savana 2500

The Heater, defroster blower keeps runing even with the ignition off? The only way to stop it is by unpluging the blower connector.

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2 answers
Sounds like your fan switch has failed and its probably a dealer only item
ITS NOT THE FAN SWITCH. THERE IS A SENSOR WHERE THE BLOWER PLUGS IN AND THIS NEED REPLACING. ABOUT 150 BUCKS FRO DEALER