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OnStar (R) Vehicle Communication Unit (VCU) Replacement




REMOVAL PROCEDURE
1. Open the rear compartment lid.
2. Remove the seat back trim panel.
3. Remove the four fasteners (1) securing the module bracket assembly (2) to the rear seat back panel (3).
4. Lower the module bracket assembly into the rear compartment.
5. Disconnect the cellular coaxial cable from the (VCU) by pulling upward the spring loaded snap connector.
6. Disconnect the electrical connector.
7. Remove the OnStar vehicle communication unit (VCU) by lifting the retainer tab.
8. Remove the (VCU).

INSTALLATION PROCEDURE
1. Install the OnStar� vehicle communication unit (VCU) into the module bracket assembly.
2. Connect the electrical connector.
3. Connect the cellular coaxial cable to the (VCU) until fully seated.
4. Ensure the locking tab is secure to the (VCU).
5. Install the module bracket assembly (2) to the seat back panel (3).

NOTE: Refer to Fastener Notices in Service Precautions.

6. Install the fasteners (1).

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

7. Install the seat back trim.
8. Close the rear compartment lid.
9. Perform the reconfiguration procedure.