Removal (Impala & Monte Carlo) Buick Century VI

1. Open the rear compartment lid. Pull up on the rear compartment sill plate to release the spring clips. Remove the rear compartment sill plate from rear compartment. see scheme 43 Remove the convenience net and retainers, if equipped.
2. Remove the tail lamp retainers. Remove the plastic cover from the communication interface module (On-Star module). (Scheme 40) Remove the nuts from the module bracket. Lift the module off the studs. Disconnect the cellular antenna cable from the communication interface module by pulling outward on the square plastic housing.
3. Disconnect the two lower connectors from the module. Disconnect the GPS antenna cable from the module by pulling outward on the circular metal sleeve. Remove the module and the bracket from the rear compartment. Remove the spare tire cover from the rear compartment. Remove the rear seat cushion and rear seat back.
4. Remove the push-in retainers from the rear compartment trim panel. Pull back the trim panel from the rear seating area. Remove the trim panel from the rear compartment. see scheme 44 Remove the fuel sender access panel nuts. Remove the fuel sender access panel.

1. Install the fuel sender access panel. Install the fuel sender access panel nuts. Tighten the nuts to specification. See «TORQUE SPECIFICATIONS»(ref-159248-S05123880852003112000000) . Install the rear compartment trim panel to the installed position. Press the trim over the rear shock tower studs. Install the push-in retainers to the trim panel
2. Install the spare tire cover to the rear compartment. Install the rear seat cushion and the rear seat back. Position the communication interface module and the bracket in the rear compartment. Connect the GPS antenna cable by pushing in on the metal sleeve. Connect the two lower connectors to the module.
3. Connect the cellular antenna by pressing in on the square plastic housing. Install the nuts to the interface module bracket. Tighten the nuts to specification. Install the plastic cover on the communication interface module. Install the convenience net and retainers, if equipped. Install the tail lamp retainers. Install the sill plate. Close the rear compartment.

Scheme 39

Scheme 40

1. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-159248-S06644035342003112000000). Drain fuel tank. See «FUEL TANK DRAINING»(ref-159248-S36442245662003112000000). If necessary, remove the fuel sender access panel. See «FUEL SENDER ACCESS PANEL»(ref-159248-S14917706482003112000000).
2. Disconnect the fuel sender quick connect fittings. See «FUEL LINE DISCONNECT FITTINGS»(ref-159248-S39980982662003112000000). Disconnect the fuel sender electrical connector. Disconnect the Fuel Tank Pressure (FTP) sensor electrical connector.
3. Remove the fuel sender retaining ring.
4. Remove the fuel sender assembly. see scheme 10 Clean the fuel sender assembly sealing surfaces. Inspect the fuel sender assembly sealing surfaces.

1. Position the new fuel sender seal on the fuel tank.
2. Install the fuel sender assembly. Install the fuel sender assembly retaining ring. Connect the fuel sender electrical connector. Connect the quick-connect fittings at the fuel sender. See, «FUEL LINE DISCONNECT FITTINGS»(ref-159248-S39980982662003112000000) . Connect the fuel sender and fuel tank pressure sensor electrical connector.
3. Add fuel to the fuel tank. Install the fuel tank filler pipe cap.
4. Connect the negative battery cable. Perform the following procedure in order to inspect for leaks. Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
5. Install the fuel sender access panel. See «FUEL SENDER ACCESS PANEL»(ref-159248-S14917706482003112000000) .
6. Install the fuel injector sight shield.