Diagnostic Starting Point - Automatic Transmission: Notes
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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 in Engine Controls - 6.6L (LB7) or Diagnostic System Check - Engine Controls in Engine Controls - 8.1L. The Diagnostic System Check provides the following information:
- The identification of the control modules which commands the system
- The ability of the control modules 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 in Engine Controls - 6.6L (LB7) or Diagnostic System Check - Engine Controls in Engine Controls - 8.1L identifies the correct procedure for diagnosing the system and where the procedure is located.