GM Service Manual Online
For 1990-2009 cars only

Caution: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Tools Required

J 34730-1A , Fuel Pressure Gauge


    Object Number: 211140  Size: SH
  1. Disconnect the negative battery terminal to avoid possible fuel discharge if an accidental attempt is made to start the engine. Refer to Battery Cable Replacement .
  2. Loosen the fuel filler cap to relieve tank vapor pressure.

  3. Object Number: 49594  Size: SH
  4. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  5. Remove the fuel pressure connection.
  6. Wrap a shop towel around the fuel pressure connection while connecting the fuel pressure gauge in order to avoid spillage.
  7. Connect the fuel pressure gauge J 34730-1A to the fuel pressure connection.
  8. Install the bleed hose into an approved container and open the valve to bleed the system pressure. The fuel connections are now safe for servicing.
  9. Drain any fuel remaining in the fuel pressure gauge into an approved container.