Picked up a 1996 Jimmy and am pulling the engine. During the process I ran across a 5/32 vacuum line coming up between the block/tranny and firewall that was hanging loose and tucked in between one of the looms up higher on the drivers side of the firewall. It's loomed and the end looks jagged, not a clean cut. I've accounted for every other vacuum connection and can not figure this one out. Could it be a vacuum to atmosphere? Thanx for any ideas - much appreciated.