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#1
02-17-2005, 06:37 PM
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AC Dash Vents
I own a 98 GMC Sierra 1/2 ton. I cannot get air or heat to blow out of dash vents. Blower motor works on all setting. The temp control works. When I go to switch position from the defog to dash vents it makes a noise like it switching but no air comes out of the vents.I bought a new blower motor control system $130.00. It is all electronic with no vaume lines, I plugged it in. Still no air comming out of vents. Any help appreciated.
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#2
02-17-2005, 06:45 PM
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Re: AC Dash Vents
when you replaced all these things did you try the unit when it was disasembled to make sure nothing is blocking the airflow, that would be my guess
__________________
 technology is great when it works   but one big pain in the ass when it doesn't   Detroit Iron Rules, all the rest are just toys! 
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#3
02-17-2005, 07:40 PM
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Re: AC Dash Vents
On my 90 K1500, when I could not get air to come out the defroster, it was the mode actuator. The actuator controls where the air goes.
I took it apart and added some grease to the gear and put it back in. Did this a few months back and it is still working. On my 90, the mode actuator is above the tranny hump under the dash. Not sure where it is on the 98. //2000CAYukon
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