GM Service Manual Online
For 1990-2009 cars only

Checks

Cause

Manual Valve (319)

Valve is mispositioned or stuck.

Forward Clutch Springs (607)

Jammed

Forward Clutch Piston (606)

Jammed

Forward Clutch Plates (610, 611)

Seized or jammed

Forward Clutch Housing (602)

The hole is plugged.

Hub (613)

The holes are plugged.