GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Horns Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Horns

2

Press the horn switch.

Do horns have a harsh tone or buzzing?

Go to Step 3

Go to Step 4

3

Inspect the dual horn assembly for inadequate torque or debris in the joint where the horn attaches to the vehicle. Refer to Horn Replacement .

Did you find and correct the condition?

Go to Step 5

Go to Step 4

4

Replace the dual horn assembly. Refer to Horn Replacement .

Did you complete the replacement?

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2