GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Engine

Overheated

Filter Seal

Damaged or not seated

Left and Right Scavenge Screens

Restricted

Transmission Fluid

    â€¢ Contaminated with antifreeze
    â€¢ Transmission overfilled
    â€¢ Wrong fluid type

Transmission Fluid Filter

Cracked or not seated

Vehicle

Overloaded