GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Torque Converter Assembly (1)

Diagnose torque converter for possible internal damage.

Fluid Pump Cover Assembly (219)

    • Inspect for worn, damaged, or sticking converter feed limit valve (220) and spring (221).
    • Inspect for worn, damaged, or sticking torque converter clutch (TCC) control valve (227) and spring (226).

Control Valve Lower Body Assembly (307)

Inspect for worn, damaged, or sticking TCC regulator apply valve (355).