I'm having heater, ac fan control problems on older GMC.

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April 11th, 2010, 1:30 PM

Jeckyl

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I'm having heater, ac fan control problems on older GMC.

It started out with low fan speed stopped working and then med and now med high only works on number 4,5 positions. Anyone else have similiar problems or any suggestions? Thanks again.

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April 11th, 2010, 1:54 PM

nauticstar87

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What year GMC??

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April 11th, 2010, 7:45 PM

Jeckyl

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2001 but hey tore into it and found out its the blower motor resistor pack $25 and four screws and all good. P.S. The resistor pack is located on passenger side under blower cover below glove compartment.

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ThreadTapRODah (June 25th, 2022)

April 11th, 2010, 8:40 PM

nauticstar87

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I'm glad you fixed it, and thanks for letting us know what fixed it, it'll help others in the future.

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April 12th, 2010, 9:36 PM

Jeckyl

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No problem. Hope it helps someone.

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June 25th, 2022, 8:13 AM

ThreadTapRODah

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Quote:

Originally Posted by Jeckyl

Tis the way, my son!
If you have any electrical diag knowledge, do yourself a favor and confirm the switch in the HVAC controls isnt deadski. Theres also a blower relay that can quit, and the classic chevy cheap as poo on a summer sidewalk wiring vibrating the connections loose.