GM Service Manual Online
For 1990-2009 cars only

TCC Applies with Max Pressure - Harsh Apply

Checks

Cause

TCC PWM Solenoid Valve for OFF Failure

    â€¢ Foreign material in TCC PWM solenoid valve
    â€¢ No PCM signal
    â€¢ Insufficient force of PWM
    â€¢ Failure of the O-rings
    â€¢ Open wire
    â€¢ No supply voltage to the TCC PWM solenoid valve