GM Service Manual Online
For 1990-2009 cars only

Foaming, Milky-Appearing Power Steering Fluid for Chevrolet Optra 2004

Checks

Actions

Inspect for internal leakage in the power steering pump, causing an overflow.

Repair the internal pump leakage.

Bleed the system.

Inspect for a low fluid level.

Repair the internal pump leakage.

Bleed the system.

Cold temperatures will cause the air bubbles in the system if the fluid level is low.