Installation Procedure

CAUTION: Refer to Gasoline/Gasoline Vapors Caution in Cautions and Notices.

NOTE: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:

The fuel pipe connections
The hose connections
The areas surrounding the connections

Remove the cap from the fuel pressure service port connection.

CAUTION: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gage. Place the towel in an approved container when the connection of the fuel pressure gage is complete.

Fig 1: View Of Fuel System Pressure Tester

Courtesy of GENERAL MOTORS CORP.

Connect the J 34730-1A to the fuel pressure service connection. Wrap a shop towel around the fitting while connecting the gage to avoid spillage.
Turn the ignition ON, with the engine OFF.

CAUTION: Do not drain the fuel into an open container. Never store the fuel in an open container due to the possibility of a fire or an explosion.

Place the bleed hose of the J 34730-1A into an approved fuel container.
Open the bleed valve on the J 34730-1A in order to bleed the air from the fuel pressure gage.
Command the fuel pump ON with a scan tool.
Close the bleed valve on the J 34730-1A .
Inspect for fuel leaks.