Begin by opening and securing your hood. Take your regular screw driver and snap off trhe clips that hold down the top of your air filter box. Then with your T-30 torx, remove the three torx screws that hold the intake boot to your throttle body. If you are not sure you can remember where the vacuum lines will be returned to, mark and number them with masking tape. Now remove the top of the air box, along with the intake boot and the attached vacuum lines. Next take the T-25 torx and remove the two screws that hold the idle speed stepper motor (see attached picture) then unplug the wires that go to the stepper motor and remove it. Simply take your can of throttle body cleaner and spray off all the black soot on the stepper motor. Then take the rest of the cleaner and spray down your throttle body making sure you clean the hole that the stepper motor came out of and both sides of the throttle plate, you don't need to use the whole can, just get it clean and that enough. Go ahead and reverse the procedure remembering to replace your air filter and the placement of the vacuum lines.

If your engine still races or revs up when its not supposed to, your idle stepper motor might be bad and or the throttle position sensor (its right next to the idle stepper motor) might be out of adjustment or bad too. Both of these two items are fairly expensive, so if cleaning your throttle body doesn't fix your problem I would take your rig to the local dealer and have them check it out, it might save you a headache and some money in the long run.