GM 17099120 Fuel Injection Air Meter Body

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Remove the air intake duct from the throttle body and inspect the bore for carbon and residue build-up.

To ensure smooth operation of the throttle linkage, remove the air intake duct from the throttle body and inspect the bore for carbon and residue build-up. If dirty, clean it with solvent or carburetor cleaner, being cautious not to clean the Throttle Position (TP) sensor or Idle Air Control (IAC) motor with solvent or use a metal brush on the throttle body bore. Instead, wipe it with a clean shop rag and solvent. For four-cylinder models, disconnect the negative battery cable and remove the air intake duct. Disconnect electrical connectors from the IAC valve, MAP sensor, and TP sensor. Also, disconnect hoses such as EVAP canister purge hose, brake booster vacuum hose, AIR check valve hose, and fuel pressure regulator vacuum hose from the throttle body. Disconnect the accelerator cable (and cruise control cable if equipped), remove the throttle body mounting bolts and nuts, and take off the throttle body. Inspect and replace the throttle body gasket if necessary. For V6 models, disconnect the negative battery cable and remove the air intake duct. Disconnect the throttle body electrical connector, vacuum hose, and PCV hose. Loosen the screws on the hose clamps that secure the intake manifold plenum to the intake runners and remove the intake plenum bolts. Disconnect the EGR pipe passage bolt, rotate the intake manifold plenum up slightly, then disconnect the coolant hoses, EVAP hose, and vacuum hose from the throttle body. Remove the throttle body mounting nuts and the throttle body. Install a new throttle body gasket and complete the installation in reverse order. Reconnect the battery.