GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

1-2 Shift Solenoid Valve

    â€¢ Stuck OFF
    â€¢ Pinched wire to ground

Pressure Control Solenoid

    â€¢ Inoperative
    â€¢ Leakage
    â€¢ Pinched wire to ground

Starts at HI Line only, Driven Sprocket Support

Staked checkball missing