GM Service Manual Online
For 1990-2009 cars only

Caution: Relieve the fuel system pressure before servicing fuel system components in order to reduce the risk of fire and personal injury.

After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. In order to reduce the chance of personal injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.

Tools Required

J 34730-1A , Fuel Pressure Guage


    Object Number: 13586  Size: SH
  1. Turn the ignition Off.
  2. Remove the rear seat cushion. Refer to Seats and Carpet.
  3. Disconnect the negative battery cable to avoid possible fuel discharge if an accidental attempt is made to start the engine.
  4. Loosen fuel filler cap to relieve tank vapor pressure.

  5. Object Number: 42751  Size: SH
  6. Remove the intake manifold top cover.
  7. Connect gauge J 34730-1A to fuel pressure valve. Wrap a shop towel around fitting while connecting gauge to avoid spillage.
  8. Install bleed hose into an approved container and open valve to bleed system pressure. Fuel connections are now safe for servicing.
  9. Drain any fuel remaining in gauge into an approved container.