GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 34730-1A Fuel Pressure Gage

Installation Procedure


    Object Number: 180378  Size: SH
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.
  2. Remove the fuel rail pressure fitting cap.
  3. Connect the J 34730-1A to the fuel pressure service connection. Wrap a shop towel around the fitting while connecting the gage in order to avoid spillage.
  4. Install the bleed hose on J 34730-1A into an approved container.

Removal Procedure


    Object Number: 180378  Size: SH
  1. Remove the bleed hose on the J 34730-1A from the approved container.
  2. Remove the shop towel from around the fitting and discard into an approved container.
  3. Disconnect the J 34730-1A from the fuel pressure service connection.
  4. Install the cap on the fuel pressure connection.
  5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.