Diagnostic Starting Point - Transfer Case
WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
Begin the system diagnosis with the DIAGNOSTIC SYSTEM CHECK - TRANSFER CASE The Diagnostic System Check will provide the following information:
- The identification of the control modules that command the system
- The ability of the control modules to communicate through the serial data circuit
- The identification of any stored DTCs and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.