Diagnostic Starting Point - Instrument Panel, Gages and Console

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Begin the system diagnosis with DIAGNOSTIC SYSTEM CHECK - INSTRUMENT CLUSTER , DIAGNOSTIC SYSTEM CHECK - DRIVER INFORMATION SYSTEMS or DIAGNOSTIC SYSTEM CHECK - AUDIBLE WARNINGS . The Diagnostic System Check will provide the following information:

The identification of the control module(s) which command the system
The ability of the control module(s) to communicate through the serial data circuit
The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Begin the audible warning system diagnosis by reviewing the system operation. Reviewing the operation information will help you determine the correct symptom diagnostic procedure when an audible warning malfunction exists. Reviewing the operation information will also help you determine if the condition described by the customer is normal operation. Refer to SYMPTOMS - INSTRUMENT PANEL, GAGES AND CONSOLE in order to identify the correct procedure for diagnosing the audible warning system and where the procedure is located.