GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Case Assembly

    • Inspect for cracked or broken case.
    • Inspect for porosity or damage on the sealing surfaces.
    • Inspect for loose oil cooler line bolts or damaged oil cooler line seals.
    • Inspect for damaged manual shift shaft seal.
    • Inspect for damaged or worn axle seal on the axle shafts.
    • Inspect for plugged vent cap.
    • Inspect for loose drain plug.

Valve Body Cover Assembly

    • Inspect for damaged or warped valve body cover assembly.
    • Inspect for damaged or improperly installed valve body cover gasket.
    • Inspect for loose valve body cover bolts.
    • Inspect for damaged or improperly installed wire connector hole seal.