Diagnostic Starting Point-Automatic Transmission: Notes
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Begin the system diagnosis with DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS . The Diagnostic System Check provides the following information:
- The identification of the control module which commands the system
- The ability of the control module to communicate through the serial data circuit
- The identification and status of stored diagnostic trouble codes (DTCs)
The use of DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS identifies the correct procedure for diagnosing the system and where the procedure is located.