Installation Procedure

Tools Required

• J 34730-1A  Fuel Pressure Gage. See Special Tools .
• J 42242  Fuel Pressure Gage Adapter

CAUTION: Refer to Gasoline/Gasoline Vapors Caution .
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
1. Remove the cap on the fuel pressure service connection.
Fig 1: Identifying J 42242 & J 34730-1A
Courtesy of GENERAL MOTORS CORP.
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.
2. Connect the J 42242  (1) and the J 34730-1A  (2) to the fuel pressure service connection. See Special Tools . Wrap a shop towel around the fitting while connecting the gauge to avoid spillage.
3. 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.
4. Place the bleed hose of the J 34730-1A  (2) into an approved gasoline container. See Special Tools .
5. Open the bleed valve on the J 34730-1A  (2) in order to bleed the air from the fuel pressure gage. See Special Tools .
6. Command the fuel pump ON with a scan tool.
7. Close the bleed valve on the J 34730-1A  (2). See Special Tools .
8. Inspect for fuel leaks.