Question about 1995 GMC Sonoma
The air flow control does not change to ac or vent
it is only doing full heat.
I had the same problem and my father in law and had found that when you switch from air ac to heat it doors under the dash and we just hit them round blower cases under there and the gates in side there opened the best way to figure that out is flip it back and for and see if you can here a poping sound
Posted on Nov 23, 2011
Sound like heater box has issues. doies the heater box have trash in it, like leaves???? It might be a vacuum line dry rottering and making the dampher not work properally. I need to be there to really check it out??????
Posted on Feb 02, 2009
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Posted on Jan 02, 2017
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