BLOWER MOTOR

2005 GMC Sierra

Tiny

rtheroys

May, 24, 2010 AT 5:54 PM

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

1 Answer

Tiny

hmac300

May, 25, 2010 AT 5:00 PM

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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