Test Description

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 GMC Savana Special, 2002 GMC Savana Camper Special, and 2002 GMC Savana. 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 a 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 determines if voltage is constantly being applied to the control circuit of the fuel pump relay.