Can I recommend that you get the idle motor kit...
I don't know how much it is now, but it works really well.
the stock one is controlled by the stock ECU only.
You can easily make a blank plate for the Throttle Body, or I can send you my OEM one that I modified. I want no money for it, just like $8.00 to ship it.
The Haltech opens and closes this valve to maintain a target idle.
[h=3]Haltech Idle Speed Control Motor & Housing[/h] The Haltech Idle Speed Motor is a 4 wire stepper motor controlled idle valve, this valve allows the ECU to control the volume of air entering the intake manifold at idle.
Once the ECU has control of the volume of air entering the intake manifold it can control idle speed regardless of engine temperature, engine load (from an automatic gearbox or AC compressor) or additional electrical load (from AC controls or headlights).
The Haltech Idle Speed Motor has been designed specifically for use with the Haltech idle speed control housing (although it can also be used directly with some GM throttle bodies). The Haltech idle speed control housing is machined from block aluminum to exacting tolerances required for a perfect seal every time. The housing is then anodized black for that stealth look inside your engine bay.
The Haltech Idle Speed Motor connects via a weatherproof 4 wire connector.