Question about 1998 GMC Sierra

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1996 s-10 p/u non-working heater blower

I tested the motor,it's fine. when I unplug from the motor speed resistor,The fan will work on high speed only.If I plug back in ,nothing......probably the resistor? thanks

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  • jjhorst Nov 29, 2008

    The heater core would be a seperate issue in that it"s part of the cooling system,whereas, this appears to be an electrical problem! Thanks for your input,though! I'm trying to find out if there is a relay,and i'm thinkin so at this point.

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No more than likely a heater core issue take it down to a local garge and have them do a test on the heater core

Posted on Nov 29, 2008

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=======

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87b9810.jpg

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