Throttle Body Assembly Removal and Replacement

Throttle Body Removal:

CAUTION: The throttle bore and valve deposits may be cleaned on the vehicle, using carburetor cleaner and a parts cleaning brush. Do Not use a cleaner that contains Methyl Ethyl Ketone. It is an extremely strong solvent, and not necessary for this type of deposit.
^ The throttle body parts may be cleaned following disassembly, in a cold immersion type cleaner such as GM X-55 or equivalent.
^ The throttle position sensor (TPS) and idle air control (IAC) valve should not come in contact with solvent or cleaner, as they are electrical components and may be damaged.

REMOVAL:

1. Disconnect the negative battery cable.
2. Partially drain the radiator, to allow the coolant hoses to be removed from the throttle body.
3. Remove the air intake duct.
4. Disconnect the electrical connectors from the TPS and IAC valve.
5. Disconnect the vacuum lines.
6. Remove the coolant hoses from the throttle body.
7. Disconnect the throttle, T.V. (transmission control), and cruise control cables.
8. Remove the throttle body bolts.
9. Remove the throttle body assembly and flange gasket, discard the gasket.

NOTE: Use care in cleaning old gasket material from machined aluminum surfaces. Sharp tools may damage sealing surfaces.

INSTALLATION:

1. Install the throttle body assembly with a new gasket.
2. Install the throttle body attaching bolts, and tighten to 24 Nm (18 lb.ft).
3. Connect the throttle, T.V., and cruise control cables.
4. Connect the coolant hoses to the throttle body.
5. Connect the vacuum lines.
6. Connect the electrical connectors to the TPS and IAC valve.
7. Install the air intake duct.
8. Refill the radiator.
9. Connect the negative battery cable.