ECM Replacement

If the engine control module (ECM) is replaced, the following procedures must be performed:

• The ECM Reprogramming-Refer to Service Programming System (SPS) .
• The CKP Variation Learn-Refer to Crankshaft Position System Variation Learn .
• The Theft Deterrent Programming-Refer to Theft Deterrent Control Module Programming and Setup .
• The Fuel Composition Diagnostic-Refer to Fuel Composition Diagnosis for the 5.3L (LMG or LC9).
• Engine Oil Life Remaining-When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was replaced.
• Transmission Fluid Life Remaining-When available, use a scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.