2003 GMC Envoy Blower

2003 GMC ENVOY
65,100 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
QUASAR40
  • MEMBER
  • 1 POST
What causes teh blower to stay on after the the vechicle is turned off?
Jan 21, 2009 at 7:31 PM
Advertisement
Avatar
BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
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.



Thanks for using 2CarPros.com!
Jan 21, 2009 at 9:28 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.