Vacuum line Question
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Senior User
Joined: Jan 2010
Posts: 198
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From: Tucson, AZ
Vacuum line Question
I have a vacuum line that runs from a vac tree on the back of the motor that goes from rubber hose into metal line, it runs down beside the transmission turns back into rubber hose and has a bolt in the end to plug it. The other one in the pic goes to the modulator. The one that is plugged is the smaller one behind the transmission dip stick. What could it be for?
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Some C6 transmissions had modulators that had two vacuum lines going to them. A PO probably replaced that one with the more common single line modulator and left the unused line hanging.
Originally, the second line tied into the emission system.
Originally, the second line tied into the emission system.
Junior User
Joined: Jan 2010
Posts: 70
Likes: 0
From: Manitoba, Canada
The other day i was taking off the old cruize control until in my engine and it was a vacuum hose to the tree which i plugged with a bolt. It could very easily also be from a previous cruize control unit someone took off.
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