GM Service Manual Online
For 1990-2009 cars only

Second Gear Starts for Generic Unit Repair 2002

Second Gear Starts

Checks

Cause

Intermediate Clutch Plates (631, 632)

Seized

Direct Clutch Lube Feed

Blocked

Center Support Springs (635)

Jammed

Center Support Piston (636)

Jammed

1-2 Shift Solenoid Valve (313)

    • Stuck Off
    • O-ring failed
    • No voltage to the solenoid
    • Poor connection

PCM

No PCM signal to the solenoid

Quad Driver Module

Failed

1-2 Shift Valve (314)

Stuck

Check the PCM for current DTCs