Test Description
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic procedure.
- 1 - Perform this procedure to determine that no EVAP diagnostic DTC is present.
- 3 - This test locates fuel leakage in the fuel pipes.
- 4 - This tests for fuel leaks below the fuel tank fuel level.
- 5 - This test locates fuel vapors escaping above the fuel level in the fuel tank.