My 2000 Chevy blazer has a random vacuum hose coming out of the engine with a bolt in it. This line also has a check valve in it. Every post I have looked at hasn't shown it. Can anybody help please!?

 

Pics would help to identify the line, or at the very least a description of where the line comes off the block.

 

Right around the pcv valve on the drivers side it connects to a check valve t. From that check valve T, it either runs to the drivers side panel, or it runs to this bolt. If that makes any sense. I'm a new member so I'm not sure how to post pics yet otherwise I would.

 

probably connects to the vacuum ball in the drivers side fender. connection is under the abs module

 

Those connections are in place. This one is closer to the Throttle body. Will try to add pics soon

 

[IMG][/IMG]

This is it.

 

This is the diagram I made from what I saw.

[IMG] screenshot tool[/IMG]

 

Thinking its a vacuum line for the 4 wheel drive or hvac. Does your 4 wheel drive work or do your heat vents change. Floor/defrost/interior?

 

 

4 wheel drive works. Heat works but softly blows even when turned off. Random spurts of cool air sometimes