Diagnostic Aids

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Ensure that the fuel level is in the same range as the customer concern.
For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Refer to Fuel Level Specifications in order to verify the correct fuel level sensor readings. The Fuel Tank Level Remaining (%) parameter is available on the scan tool in the powertrain control module (PCM) Enhanced EVAP data list.

IMPORTANT: When inspecting for a deformed or warped fuel tank, measure the resistance of the suspect fuel level sensor at empty, with the sensor in the fuel tank, and again with the sensor removed from the fuel tank. The measured resistance values should be the same at empty. If the measured resistance values are not the same, refer to Fuel Tank Replacement (Right) or Fuel Tank Replacement (Left) in Engine Controls.