Volt

Control Valve Body Cover Replacement

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
2. Disable the high voltage system. Refer to High Voltage Disabling .

Danger: Do not use a service jack in locations other than those specified to lift this vehicle. Lifting the vehicle with a jack in those other locations could cause the vehicle to slip off the jack and roll; this could cause injury or death.

3. Remove the drive motor battery radiator surge tank. Refer to Drive Motor Battery Radiator Surge Tank Replacement .
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
5. Drain the transmission. Refer to Transmission Fluid Replacement .
6. Disconnect the transmission auxiliary fluid pump wire retainer from the upper retaining stud on the control valve body cover.



7. Remove the wire harness retainer (2) from the control valve body cover stud, if fitted.
8. Disconnect the control valve body transmission control module (TCM) electrical connector (1).



9. Disconnect the heated oxygen sensor wire retainer (1) from the control valve body cover stud.
10. Disconnect the heated oxygen sensor connectors (2, 3).
11. Remove the connector bracket retaining fasteners (4).
12. Position bracket away from the control valve body cover.



13. Remove the 14 control valve body cover fasteners (1,2).
14. Remove the control valve body cover.
15. Remove the control valve body cover gasket, if necessary.

Caution: Support the control solenoid valve assembly around the connector when removing the seal. Excessive pulling force can damage the internal electrical connections.

16. Remove the control valve body cover wiring connector hole seal, If necessary.
17. Remove all traces of the old gasket material. Clean the transmission case and control valve body cover gasket surfaces.

1. Install the control valve body cover wiring connector hole seal, if removed.
2. Install the control valve body cover gasket to the control valve body cover, if removed.
3. Install the control valve body cover.

Caution: Refer to Fastener Caution in the Preface section.





Note: Install all control valve body cover bolts and studs by hand then torque all bolts and studs in the sequence shown.

4. Tighten the 14 control valve body cover fasteners in the sequence shown to 9 N·m (80 lb in).



5. Connect the control valve body TCM electrical connector (1).
6. Install the wire harness retainer (2) to the control valve body cover stud.
7. Connect the transmission auxiliary fluid pump wire retainer to the upper retaining stud on the control valve body cover.



8. Connect the heated oxygen sensor wire retainer (1) to the control valve body cover stud.
9. Position bracket on the control valve body cover studs.
10. Install the connector bracket retaining fasteners (4), Then tighten the fasteners (4) to 9 N·m (80 lb in).
11. Connect the heated oxygen sensor connectors (2, 3).
12. Lower the vehicle.
13. Fill the transmission. Refer to Transmission Fluid Replacement .
14. Install the drive motor battery radiator surge tank. Refer to Drive Motor Battery Radiator Surge Tank Replacement .
15. Enable the high voltage system. Refer to High Voltage Enabling .
16. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
17. Check for leaks.