1999 Buick Park Avenue gas tank removal

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
* Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.
* Replace the fuel sender O-rings when re-installing the fuel sender in order to avoid damage to the fuel sender assembly.

1. Relieve the fuel system fuel pressure.
2. Drain the fuel tank (1) to at least 3/4 of a tank full.

3. Remove the spare tire cover, jack, and the spare tire.

CAUTION: Refer to Remove the rear compartment trim Caution in Cautions and Notices.

NOTE: Remove the rear compartment floor trim to avoid damage from fuel spillage.

4. Remove the rear compartment trim.
5. Remove the fuel sender access panel (1).

6. Clean all of the fuel pipe connections, all of the hose connections, and all of the areas surrounding the connections before disconnecting the connections in order to avoid possible contamination of the fuel system.

NOTE: Remove the rear compartment floor trim to avoid damage from fuel spillage.

7. Remove the quick-connect fittings at the fuel sender assembly.
8. Remove the electrical connector at the fuel sender.
9. Remove the electrical connector at the fuel tank pressure sensor.

IMPORTANT:

* The modular fuel sender will spring-up when the retaining cam is removed.
* When removing the modular fuel sender assembly from the fuel tank, the reservoir bucket on the fuel sender assembly is full of fuel. The fuel sender assembly must be tipped slightly during removal in order to avoid damage to the float. Place any remaining fuel into an approved container once the fuel sender assembly is removed from the tank.

10. Remove the fuel sender retaining ring using the J 39675 Fuel Sender Spanner Wrench.

11. Remove the fuel sender assembly retaining cam, using the J 39675 Fuel Sender Spanner Wrench.
12. Remove the fuel sender assembly and the O-ring from the fuel tank.
13. Discard the fuel sender assembly O-ring.
14. Clean the fuel sender assembly O-ring sealing surfaces.
15. Inspect the fuel sender assembly O-ring sealing surfaces.

INSTALLATION PROCEDURE

NOTE: Always re-attach the fuel lines and fuel filter with all original type fasteners and hardware.

Do not repair sections of fuel pipes.

IMPORTANT: Always replace the fuel sender O-ring when the reinstalling the fuel sender assembly.

1. Position the new fuel sender assembly O-ring on the fuel tank.

IMPORTANT: Care should be taken not to fold over or twist the fuel pump strainer when installing the fuel sender assembly, as this will restrict fuel flow. Also, assure that the fuel pump strainer does not block full travel of float arm.

2. Assemble the fuel sender assembly and the fuel sender assembly retainer cam using the J 39675 Fuel Sender Spanner Wrench.

IMPORTANT: Care should be taken not to fold over or twist the fuel pump strainer (4) when installing the fuel sender assembly, as this will restrict fuel flow. Also, assure that the fuel pump strainer does not block full travel of float arm.

3. Install the fuel sender assembly and the fuel sender assembly retainer cam using the J 39765 Fuel Sender Spanner Wrench.
4. Install the quick-connect fittings at the fuel sender assembly.

5. Install the electrical connector at the fuel tank pressure sensor.
6. Install the electrical connector at the fuel sender assembly.
7. Install the negative battery cable.
8. Inspect for leaks.

8.1. Turn the ignition switch On for 2 seconds .
8.2. Turn the ignition switch Off for 10 seconds .
8.3. Turn the ignition switch On.
8.4. Check for fuel leaks.

NOTE: Refer to Fastener Notice in Cautions and Notices.

9. Install the fuel sender access panel.

Tighten
Tighten the bolts to 2 N.m (18 lb in) .

10. Install the rear compartment floor trim.
11. Install the spare tire, the jack, and the spare tire cover.

12. Add fuel and install the fuel tank filler pipe cap.

There you go no need to drop the tank you can get from the trunk access panel.