Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. 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 & POOR CONNECTIONS .
- Refer to Fuel Level Specifications in order to verify the correct fuel level sender readings. The Fuel Tank Level Remaining % parameter is available on the scan tool in the PCM Enhanced Evap Data list.