Horn Missing or Does Not Sound Right

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

The horn sounds poor or does not sound right.

A running production change was made eliminating the right hand (high-note) horn and wiring used in previous years. A single note horn is now used on all 2003 model year vehicles. Do not install a second horn and wiring.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.