CTS RWD V8-6.2L SC (2009)
9. Use the J 45722 - wrench (1) and a long breaker-bar (2) to install the fuel tank module lock ring (3), by turning clockwise, until fully seated.
10. Connect the electrical connector (1) to the secondary fuel tank module and engage the connector interlock.
11. Install the fuel tank. Refer to Fuel Tank Replacement (See: Fuel Delivery and Air Induction/Fuel Tank/Service and Repair).