GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Momentarily press the horn switch.

    • Both horns sound when pressing the horn switch.
    • Both horns stop sounding when the horn switch is released.
    •  Horns Inoperative
    •  Horns Always On

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.