GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Fluid Pump Assembly (203)

    • Inspect for loose Fluid Pump Bolts (204)
    • Inspect for leaking or damaged Fluid Pump Outlet Seals (57) and Oil Filter Seal (202)
    • Inspect for improperly installed or damaged Oil Filter (201)
    • Inspect for sticking Line Pressure Blow Off Valve

Front Differential Drive Gear Support Assembly (208)

    • Inspect for leaking or damaged Drive Gear Support Torque Converter Seal Assembly (206) or Fluid Passage Tube Gasket (212)
    • Inspect for leaking or damaged Drive Gear Support Fluid Passage Tube Assembly (209)

Upper Valve Body Assembly (312)

    • Inspect for leaking or damaged Upper Valve Body Assembly (309) Gasket
    • Inspect for worn, sticking or damaged Pressure Regulator Valve (337) or Pressure Regulator Valve Spring (338)

Lower Valve Body Assembly (313)

Inspect for leaking or damaged Lower Valve Body Assembly (313) Gasket

Control Valve (w/Body & TCM) Valve Assembly (15)

Inspect for leaking or damaged Filter Plate Assembly Seals (16)

Case Assembly (51)

Inspect for missing Lube Oil Circuit Orifice or Baffle (229)