2000 GMC C3500 Idle Control Valve

You should remove the intake air resonator from the Throttle Body, and inspect the throttle body bore and the throttle valve plate for deposits, clean the throttle body bore and the throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or an equivalent product, remove and disassemble the throttle body for cleaning if the deposits are excessive. After disassembly, you should clean the throttle body using a part cleaning brush, assemble and install the throttle body if previously done, and install the intake air resonator.

You should disconnect the negative battery cable and the MAP Sensor harness connector, remove the MAP sensor by pulling straight up with a slight rocking motion, remove the MAP sensor grommet and discard the MAP sensor grommet.

You should with the throttle valve closed, install the TP sensor on the throttle shaft, rotate the TP sensor counterclockwise to align the mounting holes, install the TP sensor attaching fasteners, and install the TP sensor harness connector.