GM Service Manual Online
For 1990-2009 cars only

    Object Number: 13191  Size: SH

    Important: Some models are assembled with stamped steel control valve body covers. Some models are assembled with cast aluminum covers that have machined surfaces and threaded bolt holes. Refer to the following procedures accordingly.

  1. Inspect the control valve body cover for the following:
  2. Stamped steel

    • Dents to the gasket sealing surfaces
    • Dents anywhere that may cause interference during assembly
    • Flatness of the gasket sealing surfaces
  3. Inspect the valve body cover gaskets for nicks or other damage.

  4. Object Number: 13193  Size: SH
  5. Inspect the control valve body cover for the following:
  6. Cast aluminum

    • Cracks, nicks, or other damage to the gasket seal surfaces
    • Bolt holes for damaged or stripped threads
    • Cracks or porosity in the casting
  7. Inspect the valve body cover gaskets for nicks or other damage. With the aluminum valve body covers, you may reuse any non-damaged gaskets.

  8. Object Number: 13190  Size: SH

    Important: Do not use bolts with inverted conical washers when you assemble the stamped steel control valve body cover.

  9. Inspect the bolts (52) for inverted washers.

  10. Object Number: 13011  Size: SH
  11. Affix the cover gasket onto the transmission case assembly:
  12. Stamped steel side cover

    • Affix the steel cover inner cover gasket onto the case cover.
    • Position the steel cover onto the case.
    • Finger start the bolts and nuts.

    Tighten
    Tighten the bolts to 11 N·m (98 lb in).

    Tighten
    Tighten the nuts to 8 N·m (71 lb in).

    • Refer to Fastener Notice .

    Object Number: 13013  Size: SH
  13. Affix the cover gasket onto the transmission case assembly:
  14. Cast aluminum side cover

    • Affix the inner valve body cover gasket onto the case cover.
    • Position the aluminum cover onto the case.
    • Finger start the bolts in the positions shown.

    Tighten
    Tighten the bolts to 11 N·m (98 lb in).