2003 Chevy Tahoe fan speed only works on high

2003 CHEVROLET TAHOE
104,000 MILES • V8 • 4WD • AUTOMATIC
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MXPILOT264
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  • 1 POST
i've got a 03 tahoe and the fan speed only kicks in and works when its cranked all the way to high/5....help?
Mar 20, 2008 at 8:37 AM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
Next to the blower motor is the fan speed control resistor. Follow the power wire back from blower to it.This is most likely the culprit
Mar 20, 2008 at 10:36 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Your circuit starts at the control switch and then thru the blower motor resistor which will control the speed of the blower motor by increasing/decreasing resistances. Right now its bypassing the resistor and going direct to the motor without controlling the speed of the motor.

I totally agree with 2carpros Jack
Mar 20, 2008 at 10:53 AM
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