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vacuum line

  1. CTS First Generation Forum - 2003 - 2007
    What's the small hose coming from the bottom of the throttle body then connecting to a thin plastic line going back between the upper and lower intake manifols on an '03 3.2? I thought it was a vacuum line but it's dripping antifreeze. I've replaced the hose twice but it still drips. šŸ˜•