smog pump on 1996 Pontiac Firebird

my smog pump has two harnes .
evry auto store shows me a pump with wiht 1 harnes

Asked by for the 1996 Pontiac Firebird
I just looked a wiring diagram for the smog pump it only shows one type, one that has three wires going to it in one harness. Look at www.rockauto they usually have an image of the part make sure you are identifying the right part.