Buick 12589308 Throttle Body Assembly (W/ Throttle Actuator)

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Next, remove the throttle body mounting fasteners.

During the inspection process, it is important to verify that the throttle linkage operates smoothly. Additionally, the air intake duct should be removed from the throttle body in order to inspect the throttle body bore for any carbon or residue build-up. If any dirt is present, it should be cleaned using a solvent or carburetor cleaner that is safe for oxygen sensor systems and catalytic converters. When it comes to removal, the first step is to disconnect the cable from the negative battery terminal. Then, the air intake duct should be disconnected from the throttle body, followed by disconnecting the wiring. If working on a 3.SL or 3.9L V6 model, the heater tube nut should be removed from the throttle body. The next step is to remove the four throttle body mounting fasteners and take out the throttle body. It is important to inspect the O-ring-type gasket and replace it if it is damaged or worn. If the vehicle is old, it is recommended to replace the gasket regardless of its condition. If necessary, the throttle body should be cleaned. During installation, the process is reversed and the fasteners should be tightened to the specified torque. Finally, the engine should be started to ensure that the throttle body operates correctly and there are no air leaks.