GM Service Manual Online
For 1990-2009 cars only

The fuel sender is located inside of the fuel tank and is attached to the top of the fuel tank.

The fuel sender has a float, wire float arm, and a rheostat. The fuel level is sensed by the position of the float and the float arm which operates the 90 ohm rheostat. As the float position changes, the amount of current passing through the rheostat varies, thus changing the gage reading on the instrument panel.

Fuel Strainer

A woven plastic strainer is located on the lower end of the fuel sender pickup tube in the fuel tank. This strainer prevents dirt and water from entering in the fuel line unless the strainer becomes completely submerged in water.