Chevrolet Sonic Repair Manual: Control Valve Body Cover Replacement

Removal Procedure

1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
3. Remove the front bumper fascia opening lower cover. Refer to Front Bumper Fascia Opening Lower Cover Replacement.
4. Remove the front wheel house liner inner front extension. Refer to Front Wheelhouse Liner Inner Front Extension Replacement.
5. Drain the transmission fluid.


6. Remove oil cooler inlet (1) and outlet (2) hoses from the retainer (3) on the control valve body cover.


7. Disconnect the control valve body transmission control module electrical connector (1), then unclip the wiring harness from the cover.


8. Remove the control valve body cover bolts (1).
9. Remove the control valve body cover (2).
10. Remove the control valve body cover gasket (3).

Caution:

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

11. Remove the control valve body cover wiring connector hole seal (4).
12. Remove all traces of the old gasket material. Clean the transmission case and control valve body cover gasket surfaces.

Installation Procedure

1. Install the control valve body cover wiring connector hole seal (4).
2. Install the control valve body cover gasket (3) to the control valve body cover.
3. Install the control valve body cover (2).
4. Hand start the control valve body cover bolts (1).



Caution:

Refer to Fastener Caution.

Note:

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

5. Install the control valve body cover bolts. Tighten the bolts in sequence to 12 Y (106 lb in)

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6. Connect the control valve body transmission control module electrical connector (1), then clip the wiring harness to the cover.
7. Raise the vehicle.


8. Install the oil cooler inlet (1) and outlet (2) hoses to the retainer (3) on the control valve body cover.
9. Install the front wheel house liner inner front extension. Refer to Front Wheelhouse Liner Inner Front Extension Replacement.
10. Install the front bumper fascia opening lower cover. Refer to Front Bumper Fascia Opening Lower Cover Replacement.
11. Fill the transmission with correct fluid.
12. Check transmission fluid level. Refer to Transmission Fluid Level and Condition Check.
13. Lower the vehicle.
14. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
15. Check for leaks.

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