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The air condition doesn't blow out of the vents in my 1998 gmc safari van?
Wiki User
∙ 15y ago
If the air blows out either the heater vent under the dash or the defroster vent on top of the dash the problem is there is a break, crack or a leak in the vacuum line which controls which location the air blows out. The vacuum line runs from the the front corner of the drivers side valve cover over to the HVAC mess on the front passenger side of the van. It is a small plastic vacuum line that goes over the top of the engine. It gets brittle from the engine heat and breaks in two. Best bet is to replace the entire line instead of trying to patch it. I have a 99 Astro and have fought with this as well
Wiki User
∙ 15y ago
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