Heater fan only works on high

Tiny
CRAWDADDY
  • MEMBER
  • CHEVROLET SILVERADO
I have a 1991 chevy silverado 4x4, 5.7litre with 200,000 miles on it. Recently the heater blower only works on high. I replaced the heater blower relay and still only works on high. What do I need to check now?
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Wednesday, June 13th, 2007 AT 12:24 AM

3 Replies

Tiny
BOOTDOG
  • MEMBER
You'll need to replace the resistor.
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Wednesday, June 13th, 2007 AT 5:12 AM
Tiny
CRAWDADDY
  • MEMBER
Where is it located?
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Thursday, June 14th, 2007 AT 9:32 AM
Tiny
BOOTDOG
  • MEMBER
It'll be near the blower motor. On GM vehicles it'll be on the passengers side under the dash.
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Thursday, June 14th, 2007 AT 11:30 PM

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