GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Push the horn button.

    â€¢ Horns sounds.
    â€¢ Horn tone normal.
    â€¢  Horns Always On
    â€¢  Horns Inoperative
    â€¢  Horns Inoperative - One Horn

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