Envoy 4WD V8-5.3L VIN M (2005)
7. Connect the ECM electrical connectors (2) to the ECM (1) if previously removed.
8. Install the ECM/TCM cover (2) to the ECM/TCM bracket (1).
9. Ensure the ECM/TCM cover retainers (2) are fully engaged with the ECM/TCM bracket (1).
10. Connect the cooling fan electrical connector.
11. Connect the negative battery cable.
12. If the ECM was replaced the replacement ECM must be programmed. See: Testing and Inspection/Programming and Relearning
