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Q: Where do you reattach the vacuum hose that controls the heater on a 91 Chevy van?
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The airflow direction for my heater on a 1999 Chevy Malibu is not working properly. It doesn't direct where you want it to. Help?

if im not mistaken the heater control has vacuum lines. take off heater controls and see if you have a bad vacuum line to heater box.


No heat in your Chevy c-1500 you have replaced the heater core the thermostat water pump and have enough coolant in the system but still no heat?

Check the heater valve and/or the controls to the valve. maybe a problem with the controls, most of them are run off of vacuum, if a hose has a hole in it, it wont work


Where can you find heater vacuum line diagrams for Chevy vans?

You can find heater vacuum line diagrams for your Chevy van in most Chevrolet service manuals. The service manuals can be found at your local library.


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No or little heat at idle on Chevy Astro?

lose of vacuum to heater deverter valve.follow heater hoses from engine to heater core valve has two hoses in and two hoses out and one vacuum hose.vacuum hose gose to tee then back to engine other vacuum from tee controls heater switch defrost to floor heat knob. replace all of these lines about 6 feet will do it.now the bad, you must pull back the dog house about a foot divers side to remove one vacuum hose just do it the first time and both problems should go away.


Where is thermostat that controls the heater on a 2000 Chevy Tahoe?

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Where are the heater core controls for the front heat on a 1996 Chevy Suburban?

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Where do you reattach the vacuum hose that controls the heater on a 97 Chevy Astro van?

That vacuum line originates at a T fitting at the vacuum reservior (about a 5" black ball) located near the right front inner fender, about 2" forward and right of the engine block. A larger tube supplies the vacuum from the right rear of the upper intake manifold (plenum) fitting. This tiny plastic tube is prone to drying and splitting in the area that is exposed to engine bay heat before it goes into the wiring harness loom, so give it a good look over there. Also, the manual valve in the controls gets loose from use and will loose vac there, I've made special and cheap kits to repair this. On my '95 Astro I had only 5" of vacuum at the fitting on the plenum, a new gasket brought it back.


Where does the vacuum line enter the passenger compartment that controls the AC vents on an 87 Chevy Astro Van?

henry14@yahoo.comh


Why would the air only blow out of the dash vents but not my floor or defrost vents in my 2005 Chevy cavalier?

Check the following.......... 1. Vacuum leak, broken vacuum line or disconnected vacuum line. 2. A/C - heater inside car door operation.. 3. A/C - heater controller..