If its got an opti vent hose, its a vented opti.thanks ill send him a message, i have no clue weather my opti is vented or not but i know that looks like the piece and mine is not pulling suction on a napkin so i def need one.
I bought that one of eBay for my '94 Caprice and it was identical to the one I removed so................1994 vented Opti's do not use the same harness as the 1995/96.