I think it is just plug n play.
I know this is an old thread, but I searched because I just bought a new IAC Valve.IAC Valve Learn Procedure
Per '03 FSM
1, Start and idle engine for 15 seconds
2. Turn ignition switch to LOCK/OFF position
3. Wait 15 seconds.
4. Restart engine and check for proper idle operation.
I pulled my old one out, and it's plunger was fully compressed. The new one was extended. I did the swap and my idle went to 1500.I replaced my IAC valve on my 2000 Deville about 2 months ago.. Take the old one out and put the new one in... thats it...