2000 Astro Vacuum hose

[sicilysunrise]

I have a loose vacuum hose that came loose from the tee connections to the heater control solenoid. It looks like it came from the engine compartment and I am sure it is the main vacumn supply for the heater control vents. I have the engine cover off, (the hard part of the job), but can't see where this hose plugs in!! Very frustrating..any ideas? Thanks

[awd owner]

Had the same problem with my 99 awd the hose runs to the drivers side of the throttle body just replaced the hose and everything works like it should.

[sicilysunrise]

That was ONE of the problems! The hose I was chasing went to the vacuum resivior which was insdie the right front wheel well..impossible to get unless on a lift and then lower the lift with the frame supported. Had my mechanic do that. But it still had the problem! Brought it in to a Chevy dealer and the hose you mentioned was broke in two places..or at least they showed me one with those holes...Either way, that finally fixed it. Thanks for your interest.

[louu]

I am an owner of a 1998 Chevy Astro with rear heat and rear air. My problem was only cold air out of the rear heat and only the front defrost vents worked and the temperture selector not switching for hot to cold. I will try to be as detailed as possible. Lift the hood, and look at the large black box on the top left side of the engine. Just behind the AC reservoir, there is a vacuum line attached to the large black box on top right side, that looks like a Tee fitting with three connections. One went to the float switch on the bottom right of the larger black box near back, the other goes straight down to the vacuum ball located on the frame of the vehicle (underneath). The last is a thin vacuum line that looks like an electrical wire. Pull on all three lines one at a time. If one pulls all the way up to you, that is the broken one. The thin vacuum was broken in half on my Astro. The fix was to remove the air filter tube (the 3" flex tube that goes to the backside of the air filter box). Once removed, look for a flexible black tubing about a 1/2 inch round that should look empty because your line is broken. Pull the tubing to reveal the other half of the hose and reconnect with tubing that will fit over the thin black wire. Not sure what size, but what I did notice is that this was probably the same problem that GM fixed before when the vehicle was under warranty because my line looked repaired but was broken in a different spot. Before I reinstalled the air box tubing, I did wrap the entire flex tubing line with aluminum foil to help block the heat. I am not a professional, but I tried this and it worked for me. Good luck. This. feels like the scene in Independence Day when they figured out how to bring down the spaceships in the sky. Good luck