GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN 49495 Fuel Pressure Gage

For equivalent special tools, refer to Special Tools.


    Object Number: 1820492  Size: SH

    Warning: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.

  1. Disconnect the fuel feed line connector.
  2. Connect EN 49495 Gage to the fuel feed line connector.
  3. Check the fuel leakage.
  4. Read EN 49495 Gage . Normal fuel pressure is 415 kPa (60.2 psi) to 535 kPa (77.6 psi).
  5. Remove EN 49495 Gage .
  6. Connect the fuel feed line to the fuel rail.
  7. Prime the fuel system. Refer to Fuel System Priming.