ECM Replacement

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

1. ECM Reprogramming-Refer to Service Programming System (SPS) .
2. The CKP System Variation Learn-Refer to Crankshaft Position System Variation Learn for the 3.5L engine, Crankshaft Position System Variation Learn for the 3.9L engine, Crankshaft Position System Variation Learn for the 5.3L engine.
3. Fuel Composition Diagnosis-Refer to Fuel Composition Diagnosis for the 3.5L (LZE) engine.
4. 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.
5. Transmission Fluid Life Remaining-When available, use the scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
6. Theft Deterrent-Refer to Programming Immobilizer System Components .