GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Auxiliary Fluid Pump Housing

    • Inspect for worn, sticking, or damaged Isolator valve.
    • Inspect for worn, sticking, or damaged Isolator valve outer spring.
    • Inspect for worn, sticking, or damaged Isolator valve inner spring.
    • Inspect for worn, sticking, or damaged isolator valve and sleeve.
    • Inspect for worn, sticking, or damaged auxiliary fluid pump ball valve.

Control Valve Upper Body Assembly

    • Inspect for worn, sticking, or damaged actuator feed limit valve and spring.
    • Inspect for worn, sticking, or damaged clutch boost valve and spring.

Auxiliary Fluid Filter Assembly

    • Inspect for damaged or restricted auxiliary fluid filter assembly.
    • Inspect for damaged fluid filter seal assembly.