Fuel Pump Electrical Circuit Diagnosis: Notes

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2003 Hummer H2, 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, and 2003 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Underhood Fuse/Relay Block

Courtesy of GENERAL MOTORS CORP.

Fig 2: Fuel Pump Electrical Schematic

Courtesy of GENERAL MOTORS CORP.