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 in the diagnostic procedures.

2

Listen for an audible click when the fuel pump relay operates. Command both the ON and OFF states. Repeat the commands as necessary.

4

This step verifies that the PCM is providing voltage to the fuel pump relay.

5

This step tests for an open in the ground circuit to the fuel pump relay.

6

This step tests if voltage is constantly being applied to the control circuit of the fuel pump relay.