Compression Ignition Addict
Join Date: Feb 2011
Location: Loudonville OH
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HVAC not switching position
As most of you know. our trucks still use vaccum to control the switch as to where the air from our HVAC comes out of in out trucks.
Now mine is not working, i know my vaccum pump is running i hear it when i turn my key on. The vaccum lines i can see look fine under the hood. I cant really see any under the dash.
Has anyone had this problem? What did you do to fix it? It really sucks just having the heat on defrost all the time cause thats where it defaults to.
Colin S. Age:22 Certified Diesel Tech, Infantry US ARMY
E99 7.3 6spd 4x4 6637, 4" straight pipe, 365,000 miles
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"wear your high mileage as a badge of honor"
04 GMC 2500 4x4 Duramax/Allison