GM Service Manual Online
For 1990-2009 cars only

Fuel door release actuation is controlled by the following components.

    • Fuel Door Release Relay
    • Instrument Panel Module (IPM)
    • Rear Integration Module (RIM)
    • Valet Switch
    • Fuel Door Release Switch
    • Fuel Door Release Actuator

Battery voltage for the coil side of the fuel door release relay is supplied through the Valet switch (with the valet switch in the OFF position) by the ALDL fuse located in the Underhood Fuse (Bussed) Block. Battery voltage for the switch side of the fuel door relay is supplied by the Body fuse located in the Rear Fuse (Bussed) Block. When the fuel door release switch is momentarily pressed, it provides a ground circuit for the fuel door release signal of the Instrument Panel Module (IPM). When the IPM senses that the switch has been activated, it sends a Serial Data Class 2 message to the Rear Integration Module (RIM). The RIM then applies a ground path on the fuel door release actuator relay control circuit energizing the relay thus applying battery voltage to the fuel door release actuator. The actuator is connected to ground through a ground splice pack located at the left rear corner of the rear compartment, near the left tail lamp connector.