Removal (High Pressure Regulator-To-Union)

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Combustible Gas Detector (J-45878) is required for this procedure. See Figure .

Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect the negative battery cable(s). Remove the fuel tank cover. See FUEL TANK COVER .
Disconnect the High Pressure Regulator (HPR) fuel outlet line from HPR. See Fig 1 . Raise and support the vehicle. Disconnect the HPR fuel outlet line from underbody line. See Fig 2 . Remove the line from the vehicle.

Fig 1: Disconnecting High Pressure Regulator Fuel Inlet Line

Courtesy of GENERAL MOTORS CORP.

Fig 2: Disconnecting High Pressure Regulator-To-Underbody Line

Courtesy of GENERAL MOTORS CORP.