Question about 1990 GMC Sierra
The heater works just fine but when i turn on the defroster the heater still stays on.i am not sure if it is the ducts or the controls.
It sounds as though you're having problems with your controls...if it were the ducts...you'd get some kind of a air current..even a faint one
hope this helps
Posted on Jan 03, 2009
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Posted on Jan 02, 2017
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