GM Service Manual Online
For 1990-2009 cars only

Fluid Foaming

Checks

Causes

Fluid

    • Degraded fluid
    • Contaminated antifreeze
    • The transmission is overfilled

Cooler Lines

Plugged

Transmission Oil Filter (85)

Clogged or cracked

Filter Seal (84)

Leaking

Side Cover Seal (6)

Damaged

Engine

Overheated

Vehicle

Overloaded

Oil Level Control Valve (86)

Damaged or loose