Diagnostic Aids
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Ensure that fuel level is in same range as customer concern. For intermittent diagnosis, see DIAGNOSING INTERMITTENTS . Refer to FUEL LEVEL SPECIFICATIONS table in order to verify correct fuel level sensor readings. FUEL TANK LEVEL REMAINING parameter is available on scan tool in PCM EVAP data list.