GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 12592  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the throttle body from the intake manifold.

  3. Object Number: 35845  Size: SH
  4. Remove the IAC valve.

  5. Object Number: 35848  Size: SH
  6. Remove the idle air control valve/coolant cover assembly screws.
  7. Remove the idle air control valve/coolant cover assembly and the gasket. Discard the gasket.
  8. Clean the gasket sealing surfaces.
  9. Inspect the gasket sealing surfaces for corrosion or damage that would cause a coolant leak. Replace the idle air control valve/coolant cover assembly or the throttle body if necessary.

Installation Procedure


    Object Number: 35848  Size: SH
  1. Install a new gasket.
  2. Install the idle air control valve/coolant cover assembly.
  3. Install the idle air control valve/coolant cover assembly screws.
  4. Tighten
    Tighten the idle air control valve/coolant cover assembly screws to 3.2 N·m (28 lb in).


    Object Number: 35845  Size: SH
  5. Install the IAC valve.

  6. Object Number: 12592  Size: SH
  7. Install the throttle body to the intake manifold.
  8. Connect the negative battery cable.