GM Service Manual Online
For 1990-2009 cars only

Second and Third Gear Only

Checks

Cause

1-2 Solenoid (313) - Check for DTCs

    • Stuck Off
    • Loose connector
    • No voltage to the solenoid
    • Solenoid O-ring failure
    • No PCM signal to the solenoid

1-2 Shift Valve (314)

Stuck

Quad Driver Module

Failed

Check the VCM/PCM for current DTCs