Fuel System Pressure Release

WARNING: This page is about a different car, the 2003 Saturn Ion 3, 2003 Saturn Ion 2, and 2003 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable.
Loosen the fuel filler cap to relieve the fuel tank vapor pressure.
Remove the cap from the fuel pressure service port.
Connect Gauge Bar Set (SA9127E) or Fuel Pressure Gauge (J 34730-1A), or equivalent, to the fuel pressure connection, located on the fuel rail. See Fig 1 or Fig 2 .
Place the bleed hose of the gauge bar set or fuel pressure gauge into an approved fuel container.
Open the valve to bleed the system pressure. The fuel connections are now safe for servicing.
Disconnect the gauge bar set or fuel pressure gauge from the fuel pressure connection.

Fig 1: Identifying Gauge Bar Set Components

Courtesy of GENERAL MOTORS CORP.

Fig 2: Connecting Fuel Pressure Gauge (J 34730-1A)

Courtesy of GENERAL MOTORS CORP.