GM Service Manual Online
For 1990-2009 cars only

Tools Required

SA9127E Gage Bar Set

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 898897  Size: SH
  1. Disconnect the negative battery cable.
  2. Disconnect the intake air temperature (IAT) sensor connector.
  3. Loosen the clamp at the air cleaner assembly.
  4. Remove the push-pin attachment from the outlet resonator/duct assembly-to-support bracket.
  5. Loosen the clamp at the throttle body assembly.
  6. Disconnect the positive crankcase centilation (PCV) fresh air vent hose at the cam cover.
  7. Remove the outlet resonator/duct assembly.

  8. Object Number: 951506  Size: SH
  9. Remove the ignition module bolts.
  10. Remove the ignition module assembly.
  11. Disconnect the coolant degas hose from the fuel rail.
  12. Disconnect the degas hose clamp at the cylinder head and position it away from the cam cover assembly.

  13. Object Number: 895199  Size: SH
  14. Disconnect the ground strap at the rear of the cam cover assembly.

  15. Object Number: 854376  Size: SH
  16. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  17. Disconnect the SA9127E after the pressure has been relieved.

  18. Object Number: 854304  Size: SH
  19. Disconnect the fuel rail bracket and bolt at the rear of the cam cover.
  20. Caution: Whenever fuel line fittings are loosened or disconnected, wrap a shop cloth around the fitting to collect fuel. Place the cloth in an approved container.

    Notice: An open-end wrench must be used to support the fuel line to rail connection during loosening/tightening to avoid damaging the fuel rail assembly.


    Object Number: 854303  Size: SH
  21. While supporting the fuel rail assembly with an open end wrench, loosen the transfer line fitting at the fuel rail.
  22. Position the fuel line away from the cam cover assembly.

  23. Object Number: 894940  Size: SH
  24. Remove the cam cover assembly bolts.
  25. Remove the cam cover assembly.

Installation Procedure


    Object Number: 894940  Size: SH
  1. Visually inspect the camshaft cover gasket for signs of leakage. The camshaft cover gasket is reusable if not damaged.
  2. Assemble the camshaft cover and gasket. Use care to make sure the gasket is located in the retaining groove on the camshaft cover.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the cover on the cylinder head and hand-tighten the bolts.
  5. Tighten
    Tighten the camshaft cover bolts to 10 N·m (89 lb in).


    Object Number: 854303  Size: SH
  6. Reposition the fuel line assembly.
  7. Notice: An open-end wrench must be used to support the fuel line to rail connection during loosening/tightening to avoid damaging the fuel rail assembly.

  8. Install the transfer line fitting to the fuel rail.
  9. Tighten
    Tighten the transfer fitting-to-fuel rail to 10 N·m (89 lb in).


    Object Number: 854304  Size: SH
  10. Connect the fuel rail bracket and bolt to the cylinder head.
  11. Tighten
    Tighten the fuel line bracket bolt to 10 N·m (89 lb in).

  12. Connect the ground strap to camshaft cover assembly.
  13. Tighten
    Tighten the camshaft cover ground strap bolts to 10 N·m (89 lb in).

  14. Connect the degas hose and clamp to the cylinder head.
  15. Connect the degas hose bracket and bolt to the cylinder head.
  16. Tighten
    Tighten the coolant pipe bracket bolt to 10 N·m (89 lb in).


    Object Number: 951506  Size: SH
  17. Install the ignition module assembly to cam cover and hand tighten the retaining bolts.
  18. Tighten
    Tighten the ignition module-to-camshaft cover bolts to 8 N·m (71 lb in).


    Object Number: 898897  Size: SH
  19. Install the outlet resonator/duct assembly into position.
  20. Connect the PCV fresh air vent hose assembly.
  21. Tighten the clamp at the throttle body assembly.
  22. Position the outlet resonator/duct assembly up with support bracket and install the push-pin.
  23. Tighten the clamp at the air cleaner assembly.
  24. Connect the IAT connector.
  25. Install the air cleaner outlet duct assembly. Refer to Air Cleaner Outlet Resonator Replacement .
  26. Connect the negative battery cable.