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System Diagnosis

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

After incorrect system operation has been verified, and that aftermarket devices or intermittent conditions are not the cause, begin the system diagnosis with the Diagnostic System Check - Vehicle. The Diagnostic System Check - Vehicle will provide the following information:

  1. The identification of the control modules that control the Power Steering System.
  2. The ability of those control modules to communicate via the serial data circuit.
  3. The presence of any stored DTCs in those control modules and there status.

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the malfunction and where the procedure is located. Refer to Diagnostic System Check - Vehicle .

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