2003 GMC Envoy Blower

Tiny
QUASAR40
  • MEMBER
  • 2003 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 65,100 MILES
What causes teh blower to stay on after the the vechicle is turned off?
Wednesday, January 21st, 2009 AT 7:31 PM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Suspect faulty blower motor resistor. The blower motor resistor is used to regulate the motors speed. When you select a higher fan speed the blower motor resistor will provide less resistance to the blower motor allowing it to spin faster thus moving more air. If the resistor pack has completely failed, it can no longer resist the currents passing through the wiring, which will cause the blower motor to continue to run.

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Wednesday, January 21st, 2009 AT 9:28 PM

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