Pontiac 12568796 Throttle Body Assembly (W/ Throttle Actuator)

Before continuing, make sure new models from 2005 and later move their throttle smoothly. After removing the air intake pipe, allow the throttle plate to open by hand. Also check the throttle channel within the throttle body for debris. If noticeable build-up, clean it using cleaning solutions compatible with oxygen sensors and catalytic converters. Unplug the black electrical wire connected to the ground battery terminal, remove the air intake tube both leading to the resonator and the intake hose from the throttle body, while also taking off the engine cover for 2.2L or 2.4L models. Remove the cable connecting to throttle body and vacuum hoses, as well as unhooking the EVAP canister outlets on 2.0L vehicles. Before reinstalling the throttle body, take off all bolts holding it in place. Inspect the O-ring under the throttle body and decide whether to keep the old one if it looks good, replacing it if the vehicle is aging or the O-ring is damaged. Clean the throttle body if necessary. Reinstall the throttle body by turning bolts in the opposite order it was removed. Repeat this process and torque the bolts to factory standards. Disconnecting the battery lets the car's main computer start to learn how it ran before. Turn the engine to check that the throttle body functions fine and there's no room for air to escape.

Disconnect the air intake duct from the throttle body. Open the throttle plate and check the area for residue build-up. If it's dirty, clean it with solvent or carburetor cleaner. Make sure that the cleaner is safe for use with catalytic converters and oxygen sensors. Disconnect the cable from the negative battery terminal. On V6 engines, pinch off the two coolant hoses to the throttle body. If you don't have tools suitable for doing this, drain the engine coolant until the level in the cooling system is lower than the throttle body. Remove the air intake duct. It can simply be disconnected from the throttle body and moved aside on some models. Disconnect the electrical connector from the throttle body. On 2004 and later V6 models, also disconnect the MAP sensor wiring. Disconnect any remaining coolant or air hoses from the throttle body. If you're working on a 2004 or later V6 model, remove the wiring harness bracket bolt from the throttle body. Remove the throttle body mounting nuts or bolts and carefully lift off the throttle body. Remove the 0-ring type throttle body gasket (four-cylinder engine). The manufacturer recommends replacing it with a new one regardless of its condition. V6 models use a different type of gasket than the four-cylinder engine-if it sticks, carefully remove all traces of gasket material. Discard the gasket; it should be replaced with a new one. Cover the intake manifold opening with a clean shop towel. Installation is the reverse of removal. Be sure to use a new gasket and tighten the throttle body fasteners. If you're working on a 2004 or later V6 model, perform the idle learn procedure. If you're working on a four-cylinder or 2003 or earlier V6 model, turn the ignition key to the Run (not Start) position for one minute, without depressing the accelerator pedal; this is necessary for the PCM to "learn" the position of the throttle plate.

It is important to verify that the throttle linkage operates smoothly.

The throttle body O-ring should be inspected and replaced if necessary.