Generator Control Module Replacement 5.3L Engine w/RPO HP2

1. Disconnect the energy storage box (ESB). Refer to Hybrid Battery Service Disconnect/Connect .
2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
3. Remove the surge tank. Refer to Radiator Surge Tank Replacement in Engine Cooling.
4. Remove the starter/generator control module (SGCM) coolant tank. Refer to Generator Control Module Coolant Tank Replacement in Engine Cooling.
5. Remove the SGCM cover bolts, and cover.
6. Remove the 3-phase cable nuts to the SGCM.
7. Remove the 3-phase cable from the SGCM.



8. Remove the connector position assurance (CPA) retainer on the engine harness electrical connector.
9. Disconnect the engine harness electrical connector.



10. Disconnect the accessory power receptacle electrical connector from the SGCM.



11. Reposition the SGCM coolant outlet hose clamp (2).
12. Remove the SGCM coolant outlet hose (1).



13. Loosen the 14-volt positive/negative battery cable bolt (1).
14. Remove the red connector position assurance (CPA) retainer.
15. Disconnect the 14-volt positive/negative battery cable.



16. Loosen the 42-volt positive/negative battery cable bolt (1).
17. Remove the red CPA retainer.
18. Disconnect the 42-volt positive/negative battery cable.
19. Disconnect the 42-volt jumper ground wire connector (2).



20. Remove the SGCM rear bolt (2).
21. Remove the SGCM front bolt (3).
22. Remove the brace (4).
23. Remove the SGCM.

1. Install the SGCM.
2. Install the brace (4).
3. Install the SGCM front bolt (3).

Notice: Refer to Fastener Notice in the Preface section.

4. Install the SGCM rear bolt (2).

Tighten
Tighten the bolts to 20 N·m (15 lb ft).




5. Connect the 42-volt jumper ground wire connector (2).
6. Connect the 42-volt positive/negative battery cable.
7. Install the red CPA retainer.
8. Tighten the 42-volt positive/negative battery cable bolt (1).

Tighten
Tighten the bolt to 9 N·m (80 lb in).




9. Connect the 14-volt positive/negative battery cable.
10. Install the red CPA retainer.
11. Tighten the 14-volt positive/negative battery cable bolt (1).

Tighten
Tighten the bolt to 9 N·m (80 lb in).




12. Install the SGCM coolant outlet hose (1).
13. Position the SGCM coolant outlet hose clamp (2).



14. Connect the accessory power receptacle electrical connector to the SGCM.



15. Connect the engine harness electrical connector.
16. Install the CPA retainer on the engine harness electrical connector.



17. Install the 3-phase cable to the SGCM.
18. Install the 3-phase cable nuts to the SGCM.

Tighten
Tighten the nuts to 15 N·m (11 lb ft).

19. Install the SGCM cover and bolts.

Tighten
Tighten the bolts to 9 N·m (80 lb in).

20. Install the SGCM coolant tank. Refer to Generator Control Module Coolant Tank Replacement in Engine Cooling.
21. Install the surge tank. Refer to Radiator Surge Tank Replacement in Engine Cooling.
22. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
23. Connect the ESB. Refer to Hybrid Battery Service Disconnect/Connect .
24. Program the SGCM. Refer to Service Programming System (SPS) in Programming and Setup.