Question 1

How to replace the secondary fuel tank module on Cadillac CTS?

Accepted Answer

Access to the replacement of the secondary fuel tank module starts by removing the fuel tank. Use gloves to handle the secondary fuel tank module electrical connector while disconnecting it followed by proper placement of the connector to protect the lock ring from damage. A combination of the J 45722 and a long breaker-bar enables counterclockwise rotation of the fuel tank module lock ring for removal. The following step is detachment of the cam lock ring. To start the replacement, disconnect the fuel transfer hose quick connect fitting from the partially removed secondary fuel tank module before taking out the module completely from the fuel tank along with discarding the fuel tank module seal. You should check the lock ring for damage; replacement of the lock ring becomes necessary if it experiences warp exceeding 0.41 mm (0.016 in). Grasp the fuel transfer hose within the tank while partially installing the secondary fuel tank module before connecting it. Succeed in attaching the fuel transfer hose quick connect fitting to the module by pressing the module downward while it aligns with the encapsulated ring and then confirm the lock ring's correct orientation allows only clockwise rotation. Install the cam lock ring using the J 45722 and extend the breaker-bar to turn the ring clockwise until it reaches complete sealing position. Reinstall the fuel tank after you reengage the connector interlock on the secondary fuel tank module and connect its electrical connector.

Question 2

How to service and repair the evaporative emissions hose connected to the canister and fuel tank on Cadillac DeVille?

Accepted Answer

Vehicle service and repair of the evaporative emissions hose starts with raising the vehicle to a suitable height. Start by carefully noting down the attaching hardware positions before removing the pieces that restrain the evap pipe/hose or disconnecting the quick connect items (1,2,3). An inspection of the evap pipe/hose reveals the evaluation of cuts and swelling as well as the detection of cracks distortion and bends after which replacement takes place in case of damaged components. To avoid chafing properly secure the new evap pipe/hose while keeping its route path identical to the original equipment. Reattach the quick connect and install the hardware to retain the evap pipe/hose just before you lower the vehicle.

Question 3

How to Replace the Primary Fuel Tank Module on Cadillac SRX?

Accepted Answer

The first step to replace the primary Fuel Tank module (NT7, NU5) includes tank fuel removal. The connector and fuel and evaporative emission lines must be taken away from both the primary and secondary Fuel Tank modules. The secondary Fuel Pump module requires uninstallation. Start the Fuel Tank sender wrench (CH 45722) to rotate the cam lock ring counter-clockwise until it releases. Proceed to take out the primary Fuel Tank module as well as the o-ring. The removal of the primary Fuel Level Sensor is required only when replacing the Fuel Pump module. The installation requires proper placement of the primary Fuel Level Sensor provided that the replacement involves only the Fuel Pump module. The ch 45722 - Fuel Tank sender wrench helps to install the cam lock ring clockwise after placing a new o-ring with the primary Fuel Tank module . The next step involves installation of the secondary Fuel Pump module together with connector attachment to the primary and secondary Fuel Tank modules and the final step includes fuel line connections with the evaporative emission system. Finally, install the Fuel Tank.

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