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Symptoms - Horns: Notes

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Important:  The following steps must be completed before using the symptom tables.

  1. Perform Diagnostic Starting Point - Horns  before using the symptom tables in order to verify that all of the following are true:
    • There are no DTCs set.
    • The body control module (BCM) can communicate via the serial data link.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to Horns System Description & Operation .
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