GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T60-E 🢒 Harsh Torque Converter Clutch Apply

TCC Applies with Max Pressure - Harsh Apply

Checks

Cause

TCC PWM Solenoid Valve for OFF Failure
    • Foreign material in TCC PWM solenoid valve
    • No PCM signal
    • Insufficient force of PWM
    • Failure of the O-rings
    • Open wire
    • No supply voltage to the TCC PWM solenoid valve