Diagnostic Starting Point - Automatic Transmission: Notes

Begin the system diagnosis with Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L and 6.0L. The Diagnostic System Check provides the following information:

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

The use of the Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L and 6.0L identifies the correct procedure for diagnosing the system and the procedure location.