gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 23115 > < Diagram Information and Instructions|Page 23112
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Cruise Control: Initial Inspection and Diagnostic Overview

DIAGNOSTIC STARTING POINT - CRUISE CONTROL

Begin the system diagnosis with the Diagnostic System Check - Vehicle. The Diagnostic System Check will provide the following information:

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The identification of the control modules which command the system

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The ability of the control modules to communicate through the serial data circuit

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The identification of any stored diagnostic trouble codes (DTCs) and their status.  See: Testing and Inspection/Initial Inspection and Diagnostic
Overview/Diagnostic System Check - Vehicle

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

Initial Inspection and Diagnostic Overview|Page 23115 > < Diagram Information and Instructions|Page 23112