1.is the fuel pump a one piece unit. 2.the center hose . how do you remove

RTM ,. read the shop manual first.? its all there to read 24/7.
Is this car A USA CAR?

generic.

1. drain tank fully, or you will get a flood of fuel on YOU.
2. remove all hoses to tank/vents and wires, to pump rack top,.
3. remove filler neck hose to tank.
4. with a floor jack under tank, and wood protector to it, try to raise tank just a tad. (1/2?") (I have car at rear on jack stands first)
5. remove tank straps. now.
6. lower jack, done.

now out of shop manual quoted SX4 , near.

1) Relieve fuel pressure in fuel feed line according to
"Fuel Pressure Relief Procedure".
2) Disconnect negative cable at battery.
3) Remove fuel filler cap.
4) Insert hose of a hand operated pump into fuel filler
hose (1) and drain fuel in space "A" as shown in
figure.(this car has check valve at tank inlet)
Hoist vehicle, and remove clamp (2), fuel filler hose
(1) and breather hose (3) from fuel filler neck.
6) Remove exhaust center pipe referring to "Exhaust
Pipe and Muffler Removal and Installation in Section
1K".
7) Remove propeller shaft (For 4WD model) referring to
"Propeller Shaft Assembly Removal and Installation
in Section 3D".
8) Due to absence of fuel tank drain plug, drain fuel
tank by pumping fuel out through fuel tank filler.
Use hand operated pump device to drain fuel tank.
Disconnect quick joint (fuel pipe) (1) from fuel pipes
(2) referring to "Fuel Hose Disconnecting and
Reconnecting".
10) Support fuel tank (1) with jack (2) and remove its
mounting bolts (3)
Lower fuel tank a little as to disconnect wire harness
at connector (1)and ground wire (2), then remove
fuel tank

You must remove the fuel tank which is underneath the trunk. Here's the procedure for removing the pump.

REMOVAL:

1. Before servicing the fuel pump the fuel system pressure must be relieved.
2. Disconnect the negative battery cable.
3. Raise the car on a hoist.
4. Remove the fuel tank.
5. Remove the fuel tank sending unit and pump assembly by turning the cam lock ring counterclockwise. Lift assembly from the fuel tank.
6. Pull the fuel pump up into the attaching hose while pulling outward away from the bottom support. Take care to prevent damage to the rubber insulator and strainer during removal. After the pump assembly is clear of the bottom support, pull the pump assembly out of the rubber connector for removal.

NOTE: Inspect the fuel pump attaching hose for any signs of deterioration. Also check the rubber sound insulator at the bottom of the pump. Replace damaged or deteriorated parts.

INSTALLATION:

1. Push the fuel pump assembly into the attaching hose.
2. Position the fuel tank sending unit and pump assembly into the fuel tank. Use a new "O" ring seal.

NOTE: Care should be taken not to fold over or twist the strainer when installing the sending unit as this will restrict the flow of fuel. Also, verify that the strainer does not block the full travel of the float arm.

3. Install cam lock over the assembly and lock by turning clockwise.
4. Reinstall fuel tank.

No but you need to drop the tank and remove the retaining ring that holds the fuel pump and sending unit in.Replace the pump as well the cost is'nt much difference.

this is for a slightly newer year Buick regal, should be similar to what you need to do unless the car was completely overhauled in design in 2 or 3 years. Good luck!...

Generally the pump is located in the gas tank. Drain the tank, remove the straps holding it up, on the top of the tank you will see the pump wiring harness. Make sure the battery is disconnected! I think the harness and pump come out as one unit. When you replace it, you will need a new harness most likely. Have you checked the pump relay and filter? I have found over the years that the pump is fine, but the relay seems to go out alot.

The fuel pump is located in the fuel tank. To change the pump you need to open the hatch between the rear sets. Move the carpet out of the way. A access panel is their, remove it.

Next you will see the fuel pump module top. Remove the 2 electrical connections and the 3 hoses. On my I had to squish the little clear part down at the hose end to remove the 2 bigger hose. The middle hose was just a matter of fighting with it back.

I would grap a volt meter and make sure that you have 12 volts on the GRAY wire on the 4 pin connector for 2 seconds when you turn the ignition on before you proceed.

Next remove the metal ring . You do this by taking a pry bar and pry the ring inward. The pump might be stuck down a bit, pry up on the pump hose connectors and lift the pump out.
Read more: http://wiki.answers.com/Q/How_do_you_replace_the_fuel_pump_located_on_a_Buick_Regal#ixzz1CuIXXEwO

Fuel Pump - Multi-Port Fuel Injection models REMOVAL & INSTALLATION 1984-95 Models Fig. 1: Loosen the hose clamps and tag the fuel hoses before disconnecting them . . .
Fig. 2: . . . then detach the hoses from the fuel pump module/sending unit
Fig. 3: Disengage the fuel pump module/sending unit wiring harness connector

1. Disconnect the negative battery cable.
2. Remove the fuel tank filler cap.
3. Relieve the fuel system pressure as outlined in this section.
4. Drain the fuel from the fuel tank.
5. Raise and support the rear end on jackstands.
6. Remove the fuel inlet and outlet hoses from the sending unit. Be ready to catch any spilled fuel.
7. Disengage the sending unit wires. Fig. 4: The fuel pump module/sending unit retaining ring must be rotated counterclockwise for removal
   
   
8. Using a brass punch and hammer, remove the sending unit retaining lockring by tapping it counterclockwise. Fig. 5: Carefully pull the fuel pump module/sending unit out of the fuel tank - step shown with the fuel tank mounted on the vehicle
   Fig. 6: Remove and discard the fuel pump module O-ring gasket
   
   
9. Remove the sending unit, which incorporates the electric fuel pump, along with the O-ring seal from the fuel tank. Discard the O-ring.
10. Remove and discard the pump inlet filter.
11. Disengage the fuel pump terminal wires.
12. Remove the pump outlet hose and clamp.
13. Unfasten the pump top mounting bracket nut and remove the pump. To install:
    
14. Install a new inlet filter on the pump. Fig. 7: This is the proper positioning of the fuel pump module assembly inside the fuel tank
    
    
15. Assemble the pump and bracket. Connect the hose and wiring.
16. Install the unit and new O-ring in the tank. The rubber stopper on the end of the fuel return tube must be inserted into the cup in the fuel tank reservoir.
17. Install the lockring. Carefully tap it into place until it seats against the stop on the tank.
18. Connect the hoses.
19. Engage the wiring.
20. Lower the vehicle, fill the tank, run the engine and check for leaks.

1996-98 Models Fig. 8: Fuel pump module location - 1996 model shown

1. Drain and remove the fuel tank as outlined in this section.
2. Using tool 6856 or its equivalent, remove the module locknut which is threaded onto the fuel tank. The module will spring up when the nut is removed.
3. Remove the module. To install:
   
4. Install a new gasket and place the module into the opening in the fuel tank.
5. Position a new locknut on top of the module and tighten the nut using tool 6856 or its equivalent to 40 ft. lbs. (54 Nm).
6. Install the fuel tank as outlined in this section. Fig. 9: Locknut removal using tool 6856 or its equivalent
   Fig. 10: Install a new gasket on the fuel tank opening
   

This is a common problem and to correct this problem will require the replacement of the fuel sending unit. The fuel sending unit is inside the fuel tank and has the fuel pump mounted in it. This requires the removal of the gas tank and then the fuel sending unit can be removed from the tank.

REMOVAL AND INSTALLATION Fig. 1: Fuel pump unit

1. Disconnect the negative battery cable.
2. Relieve fuel system pressure.
3. Remove fuel filler cap to release fuel tank vapors. Leave cap off until repairs are completed. Gasoline fuel vapors are extremely flammable. Ensure that fuel is stored in a container that can be properly sealed. Never store fuel in an open container. Store container in a safe place away from heat.
4. Remove fuel tank by performing the following:
   1. Step 1: Drain fuel from the tank into an approved container for storage.
   2. Step 2: Raise and safely support the vehicle.
   3. Step 3: Remove rear stabilizer bar at links, pivot bar downward.
   4. Step 4: Remove hoses and pipes from tank unit.
   5. Step 5: Remove hoses at tank from filler and vent pipe.
   6. Step 6: Disconnect tank unit harness from rear body harness.
   7. Step 7: Support fuel tank and disconnect 2 fuel tank retaining straps.
   8. Step 8: Remove tank from vehicle.
5. Remove sending unit, gasket and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel tank sending unit.
6. Pull fuel pump up into attaching hose while pulling outward away from bottom support. Take care to prevent damage to rubber insulator and strainer during removal. After pump assembly is clear of bottom support, pull pump assembly out of rubber connector for removal. To install:
   
7. Push fuel pump assembly into attaching hose.
8. Install fuel tank sending unit and pump assembly into tank assembly. Use new O-ring seal during reassembly.
9. Install cam lock over assembly and lock by turning clockwise.
10. Support tank and position in vehicle. Install tank straps and secure with retaining bolts. Tighten to 25 ft. lbs. (33 Nm).
11. Connect tank unit harness to body harness.
12. Connect hoses to filler and vent pipes. Tighten clamps.
13. Connect hoses and pipes to tank unit.
14. Connect rear stabilizer bar to links. Tighten bolts to 42 ft. lbs. (58 Nm).
15. Lower vehicle.
16. Refill tank and install filler cap.
17. Connect negative battery cable.
18. Start engine and check for leaks.

Yes. It's not a terribly difficult job though. First back the car onto some ramps and set the parking brake firmly. Disconnect the electrical connector for the fuel pump / fuel level sending unit. You will need to loosen the hose clamps around the fuel filler neck hose and the vent hose and remove the rubber hoses at one (either) end. There will be some 'quick disconnect' fuel lines. To disconnect these, you need to squeeze the two white plastic inside pieces together and pull them apart (it will be very obvious when you see them). Put a hydraulic floor jack under the gas tank with a piece of wood on top of it to distribute the weight of the tank over a larger area. Then you can unscrew the two straps that hold the fuel tank up and gently and slowly lower it down. Once it is down, there is a lock ring on the top of the tank that holds the fuel pump / fuel level sending unit assembly in the tank. Use a brass punch to loosen the lock ring to avoid sparks. Make sure to replace the fuel strainer and any O rings when you do the pump. Installation is (as always) the reverse of removal. Also, remember to drain any remaining fuel from the tank while you have it removed. This will make installation a lot easier.

According to the instructions, it is not accessible through the trunk on the 94 Cadillac --- REMOVAL AND INSTALLATION Fig. 1: Fuel pump unit

1. Disconnect the negative battery cable.
2. Relieve fuel system pressure.
3. Remove fuel filler cap to release fuel tank vapors. Leave cap off until repairs are completed. Gasoline fuel vapors are extremely flammable. Ensure that fuel is stored in a container that can be properly sealed. Never store fuel in an open container. Store container in a safe place away from heat.
4. Remove fuel tank by performing the following:
   1. Step 1: Drain fuel from the tank into an approved container for storage.
   2. Step 2: Raise and safely support the vehicle.
   3. Step 3: Remove rear stabilizer bar at links, pivot bar downward.
   4. Step 4: Remove hoses and pipes from tank unit.
   5. Step 5: Remove hoses at tank from filler and vent pipe.
   6. Step 6: Disconnect tank unit harness from rear body harness.
   7. Step 7: Support fuel tank and disconnect 2 fuel tank retaining straps.
   8. Step 8: Remove tank from vehicle.
5. Remove sending unit, gasket and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel tank sending unit.
6. Pull fuel pump up into attaching hose while pulling outward away from bottom support. Take care to prevent damage to rubber insulator and strainer during removal. After pump assembly is clear of bottom support, pull pump assembly out of rubber connector for removal. To install:
   
7. Push fuel pump assembly into attaching hose.
8. Install fuel tank sending unit and pump assembly into tank assembly. Use new O-ring seal during reassembly.
9. Install cam lock over assembly and lock by turning clockwise.
10. Support tank and position in vehicle. Install tank straps and secure with retaining bolts. Tighten to 25 ft. lbs. (33 Nm).
11. Connect tank unit harness to body harness.
12. Connect hoses to filler and vent pipes. Tighten clamps.
13. Connect hoses and pipes to tank unit.
14. Connect rear stabilizer bar to links. Tighten bolts to 42 ft. lbs. (58 Nm).
15. Lower vehicle.
16. Refill tank and install filler cap.
17. Connect negative battery cable.
18. Start engine and check for leaks.

Electric Fuel Pump REMOVAL & INSTALLATION The electric fuel pump used on fuel injected Nova and Prizm cars is contained within the fuel tank. On 1988–92 models it cannot be removed without removing the tank from the car. NOTE: Before removing fuel system parts, clean them with a spray-type engine cleaner. Follow the instructions on the cleaner. Do not soak fuel system parts in liquid cleaning solvent. CAUTION
The fuel injection system is under pressure. Refer to the procedure above and release pressure slowly and contain spillage. Observe no smoking/no open flame precautions. Have a Class B-C (dry powder) fire extinguisher within arm's reach at all times. 1988–92

1. Release the fuel system pressure as outlined earlier.
2. Using a siphon or pump, drain the fuel from the tank and store it in a proper metal container with a tight cap.
3. Remove the rear seat cushion to gain access to the electrical wiring.
4. Disconnect the fuel pump and sending unit wiring at the connector.
5. Raise the vehicle and safely support it on jackstands.
6. Loosen the clamp and remove the filler neck and overflow pipe from the tank.
7. Remove the supply hose from the tank. Wrap a rag around the fitting to collect escaping fuel. Disconnect the breather hose from the tank, again using a rag to control spillage.
8. Cover or plug the end of each disconnected line to keep dirt out and fuel in.
9. Support the fuel tank with a floor jack or transmission jack. Use a broad piece of wood to distribute the load. Be careful not to deform the bottom of the tank.
10. Remove the fuel tank support strap bolts.
11. Swing the straps away from the tank and lower the jack. Balance the tank with your other hand or have a helper assist you. The tank is bulky and may have some fuel left in it. If its balance changes suddenly, the tank may fall.
12. Remove the fuel filler pipe extension, the breather pipe assembly and the sending unit assembly. Keep these items in a clean, protected area away from the car.
13. To remove the electric fuel pump:
    1. Disconnect the 2 pump-to-harness wires.
    2. Loosen the pump outlet hose clamp at the bracket pipe.
    3. Remove the pump from the bracket and the outlet hose from the bracket pipe.
    4. Separate the outlet hose and the filter from the pump.
14. While the tank is out and disassembled, inspect it for any signs of rust, leakage or metal damage. If any problem is found, replace the tank. Clean the inside of the tank with water and a light detergent and rinse the tank thoroughly several times.
15. Inspect all of the lines, hoses and fittings for any sign of corrosion, wear or damage to the surfaces. Check the pump outlet hose and the filter for restrictions. To install:
    
16. When reassembling, ALWAYS replace the sealing gaskets with new ones. Also replace any rubber parts showing any sign of deterioration.
17. Assemble the outlet hose and filter onto the pump; then attach the pump to the bracket.
18. Connect the outlet hose clamp to the bracket pipe and connect the pump wiring to the harness wire.
19. Install the fuel pump and bracket assembly onto the tank.
20. Install the sending unit assembly.
21. Connect the breather pipe assembly and the filler pipe extension. NOTE: Tighten the breather pipe screw to 17 inch lbs. and all other attaching screws to 30 inch lbs.
    
22. Place the fuel tank on the jack and elevate it into place within the car. Attach the straps and install the strap bolts, tightening them to 29 ft. lbs.
23. Connect the breather hose to the tank pipe, the return hose to the tank pipe and the supply hose to its tank pipe. tighten the supply hose fitting to 21 ft. lbs.
24. Connect the filler neck and overflow pipe to the tank. Make sure the clamps are properly seated and secure.
25. Lower the vehicle to the ground.
26. Connect the pump and sending unit electrical connectors to the harness.
27. Install the rear seat cushion.
28. Using a funnel, pour the fuel that was drained from its container into the fuel filler.
29. Install the fuel filler cap.
30. Start the engine and check carefully for any sign of leakage around the tank and lines. Fig. 1: Fuel tank components — 1988 VIN Code 5 engine (Nova)
    Fig. 2: Fuel tank components — 1989–92
    

Should be relatively simple. First off, if it has an underbody spare tire, you may need to remove that. Also, I forgot to ask if the vehicle is equipped with two fuel tanks. These instructions would be for the rear tank, which would probably be a lil more difficult than the front tank.
And you should probably siphon out as much existing fuel in the tank to make it as easy to handle as possible-when that time comes.-Most tanks have a drain plug at the bottom just for this purpose. You will need a floorjack (I recommend a piece of wood that will stabilize the tank) to ease the tank down slowly-there may be some more small hoses/and /or electrical connections (fuel/tank sending unit?/pump?) that you may have to play with/remove before completely lowering to the ground.

1-remove spare tire-if applicable
2-disconnect the battery-negative cable at least or the entire battery as a whole
3-drain fuel from tank into suitable container
4-remove fuel filler hose(fuel filler door to tank-hose clamps)
5-place jack into position
6-remove straps/bolts securing fuel tank to underbody
7-lower down the tank slowly until you can access the other electrical connections/fuel lines
8-remove and disconnect those-(I use colored tyraps to mark which ones go where-because a lot are the same size)
9-If you are tranferring the fuel pump/sending unit(some are two separate units,others are one piece), I recommend a new filter bag on the fuel pump-theyre cheap
10-installation is the reverse of removal-

Hope this helps!