Question about 1999 GMC Sierra
Replaced the blower motor and the resistor going towards the blower motor and still fan will not blow on any setting.
Had this problem which took a couple different directions. First was very simple...the control knob was turning on the shaft,, it had rounded off. Put some glue on it and worked for a year until problem like you described arose again. Replaced all components like you did but had intermittent blowing. Replaced blower again which solved problem...for now anyway...defective NEW blower.
Posted on Jan 14, 2013
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Posted on Jan 02, 2017
you need to replace the fan ...its under the hood on the passenger side held in bt 3 screws and one plug this is the only motor on that side of the vehicle and only takes a half hour to change out
Posted on Jan 25, 2009
There is an updated resistor/connector package. Very expensive from GM, try your local NAPA or other parts supplier for a replacement
Posted on Jul 09, 2009
The only thing I can think of is, try replacing the relay switch for the blower motor, you replaced everything else, and you didn't mention that. I'm not saying this will work, but it's the only thing that's left.
Posted on Jul 14, 2009
Here is how to change the resistor- but also pay attention-
Did you also change the connector at the same time?
If you are changing the resistor due to overheating and melting of plastic, then you need to do the connector also, or else it will repeat fail in a very short time.
Here is a step-by-step check you can do to fix it. If you are onlygetting high speed (setting 5), then most likely you have a resistorproblem, or the wiring connector to the resistor is bad. The groundwire prong being bad is a possible cause.
Check this for step-by-step checks:
Posted on Sep 19, 2009
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