2005 GMC Sierra blower motor

Tiny
RTHEROYS
  • 2005 GMC SIERRA

Heater problem
2005 GMC Sierra V8 Four Wheel Drive Automatic 79000 miles

When I turn on my heat or ac sometimes I can control the blower motor just fine other times and this seems to be more often now the blower motor will not increase in speed

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Monday, May 24th, 2010 AT 5:54 PM

1 Reply

Tiny
HMAC300
  • EXPERT
  • 45,731 POSTS

Check the relays, switch and resistor for speed control. It may be the resistor. All you need is a test light to test everything.

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Tuesday, May 25th, 2010 AT 5:00 PM

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