GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1839426  Size: SH
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Disconnect the engine wiring harness electrical connector (1) from the intake manifold tuning valve.
  3. Unbolt and reposition the power steering pump reservoir bracket.

  4. Object Number: 1839938  Size: SH
  5. Remove the intake manifold tuning valve bolts.
  6. Remove the intake manifold tuning valve.

Installation Procedure


    Object Number: 1839938  Size: SH
  1. Lubricate the intake manifold tuning valve O-ring seal with clean engine oil.
  2. Install the intake manifold tuning valve.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the intake manifold tuning valve bolts.
  5. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  6. Position the power steering pump reservoir bracket and install the bolts.
  7. Tighten
    Tighten the bolts to 9 N·m (80 lb in).


    Object Number: 1839426  Size: SH
  8. Connect the engine wiring harness electrical connector (1) to the intake manifold tuning valve.
  9. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .