If the torx screw holes are oblongated there's your adjustment. GM is self adjusting every time you start the car, just keep your fool foot off the gas pedal.
If you can get the air intake off and see the TB while it's running, you should see the idle air bypass hole. Cover it with your finger, the jeep should idle real low or stall. If this is the case the computer is commanding the high idle. (likely). Otherwise something is hanging the main throttle blade open or you have a vacuum leak. (unlikely)
Most new stuff, especially stick shift, hangs the throttle open at around 2000 RPM as a "dashpot" when the TPS signals anything above idle. So your calibration smells off.
I guess a battery disconnect wouldn't hurt, in case this helps recalibrate.