GM Service Manual Online
For 1990-2009 cars only

Problem

Action

The defroster nozzle is obstructed.

    • Inspect the defroster nozzle.
    • Remove any foreign objects.
    • Repair any loose instrument panel pad that blocks an outlet.

The defroster air valve actuator is faulty.

    • Inspect the defroster air valve operation.
    • Replace any faulty actuator valve as necessary.