Where does the vacuum line located behind the alternator connect to? on 1999 Chevrolet Venture

We recently completed some engine work and we cannot figure out where this vacuum line that runs behind the alternator goes. The van runs good, but we can hear the sound and have an extra line.

by in Hales Corners, WI on July 23, 2014
1 answer
ANSWER by on July 23, 2014
See if the vacuum hose diagram under hood will help.

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