Do you have the 6 or the 8 cylinder?
This vehicle does not have an Idle Air Control Valve that is servicable seperately. The IAC is built into the Throttle Body, and must be serviced as a unit.
Ahhhh.. No. You splice into the IAT (Intake Air Temp) sensor, not the IAC.
The IAT is plugged into the Air Cleaner Housing duct. It is a 2-prong connector. The wire colors are Tan and Black. Tan is "signal" and Black is "reference".
It should be on the side. Follow the duct work from the Air Cleaner housing to where it meets the engine, you'll see it. If it's not there, then it will be built into the Mass Air Flow sensor (the build dates had different locations). Again, even if built into the MAF, Black and Tan.
Thats the baby. Should be Black and Tan, yes?
Glad I could help. Have a great day!