92 GP GTP idle/throttle problems?

[Logoth]

Hi,

My 1992 Grand Prix GTP just recently started revving way up when it was first started in the morning, until you put it in gear it would hover around the 2500 RPM mark. I read up on this a bit, figured it was probably the IAC, and was going to replace it as soon as I had the time. Tonight as I was driving home, the car stalled on me. It started up again as soon as I had rolled to a stop and put it in park, but this is making me wonder if maybe there's something else wrong with it. Anyone have any suggestions?

[Logoth]

Does anyone know -where- exactly the IAC is on the engine? I'm thinking of just replacing it and trying that out.