Question about 1998 Oldsmobile Bravada

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Fuel pump 1998 olds bravada

How do i replace the fuel pump? I bought a pump assembly with the pump, sending unit and tank...

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  1. Properly drain the fuel tank, then disconnect the negative battery cable.
  2. If not done already, raise and support the rear of the truck safely using jackstands.
  3. If equipped on late-model vehicles, loosen and remove the tank plastic shield.
  4. Loosen the retaining clamp and disconnect the tank filler hose from the tank neck.
If fuel and vapor hoses or pump/sending unit wiring can be accessed at this time, they may be tagged and disconnected. If not, wait for the retaining straps to be loosened and lower the tank slightly for access.
  1. Tag and disconnect and accessible wiring or hoses from the top of the fuel tank.
  2. Have and assistant support the fuel tank, then remove the fuel tank-to-vehicle straps and, if equipped, the isolation strips. If no assistant is available, position a floor jack to support the tank while the straps are removed.
  3. Lower the tank slightly, then remove the sending unit or sending unit/pump wires, hoses and ground strap. Be sure to label all connections to ease installation.
  4. Carefully lower the fuel tank from the vehicle and store in a safe place.
To install:
  1. Raise the tank partially into position in the vehicle. If you are working without an assistant, you may wish to loosely install one of the retaining straps and use a floor jack to support the tank at an angle so there is access to the sending unit or sending unit/pump assembly (as applicable).
  2. Connect the fuel/vapor hoses and wiring to the top of the fuel tank, as tagged during removal.
  3. Carefully raise the fuel tank so it is fully into position and loosely secure the retaining straps. Make sure the wires and hoses are not pinched or damaged when raising the tank. Also, be sure that the isolation strips (if used) are positioned between the retaining straps and the fuel tank.
  4. It may be easier to connect the fuel filler hose to the tank neck at this time. If desired, connect the hose and secure the clamp.
  5. Tighten the fuel tank retaining strap fasteners to specification. Tighten the strap nuts to 33 ft. lbs. (45 Nm).
  6. If not done earlier, connect the tank filler hose to the tank neck and secure using the clamp.
  7. If equipped, install and secure the tank plastic shield.
  8. Remove the jackstands and carefully lower the rear of the truck.
  9. Refill the fuel tank and install the filler cap, then check for leaks.
  10. Connect the negative battery cable.
Equipped With Shield Package
  1. Properly drain the fuel tank, then disconnect the negative battery cable.
  2. Raise and support the rear of the truck safely using jackstands.
  3. Remove the shield forward support and bracket.
  4. While supporting the shield and tank assembly with the help of both an assistant and a floor jack, remove the remaining bolts holding the assembly to the frame, then lower it sufficiently for access to the hoses and wires.
  5. Tag and disengage the hoses and wires from the sending unit assembly.
  6. Carefully lower the fuel tank and shield from the vehicle, then if necessary for service or replacement, separate the tank from the shield.
To install:
  1. If separated, install the tank to the shield.
  2. Carefully raise the tank and shield assembly partially into position with the help of an assistant and a floor jack.
  3. Connect the wiring and hoses to the sending unit assembly, as tagged during removal.
  4. Raise the tank and shield assembly fully into position, then secure to the frame using the lower retaining bolts.
  5. Install the shield forward support bracket.
  6. Remove the jackstands and carefully lower the rear of the truck.
  7. Refill the fuel tank and install the filler cap, then check for leaks.
  8. Connect the negative battery cable.
  any question I can send some diagrams

Posted on Nov 12, 2008

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1 Answer

Just replaced fuel pump/sending unit in a 2004 Bravada for a no start condition....now the gas gage doesn't work? Dropped the tank again and put OLD sending unit in....key turned on tank reads full (full...


Your replacement fuel pump assembly float got stuck somehow rendering it useless. also make sure the electrical harness was connected properly on the replacement. I take it for granted that the replacement was new? Perform a bend test on your replacement fuel pump assembly with an ohm meter. Move the float and see if the ohm meter resistance changes.

Jun 27, 2014 | Cars & Trucks

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Fuel gauge non Digital car does check system then while sitting it goes from full tank to empty and no reading's in between.


This problem is caused by a defective fuel gauge level sending unit, the sending unit is located inside the fuel tank and is part of the fuel pump assembly (known as the fuel pump module) and not sold separate from the fuel pump. To replace the fuel pump module you must remove the fuel tank from the car.

Apr 19, 2011 | 2004 Pontiac Grand Prix

1 Answer

My digital gas gage reads full all the time I have to go by my miles and sometimes that don't work and I run out of gas..how do I fix my problem


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 8470h037.gif
  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.

Dec 24, 2010 | 1992 Oldsmobile Toronado

1 Answer

I JUST WOULD LIKE TO KNOW WHERE A FUELPUMP IS LOCATED ON MY 1999 GMC JIMMY TO SEE IF I CAN REPLACE IT ON MY OWN. THANK YOU!


it's inside the tank. Please let me know if you have more questions.


FUEL TANK REMOVAL & INSTALLATION
Except With Shield Package

  1. Properly drain the fuel tank, then disconnect the negative battery cable.
  2. If not done already, raise and support the rear of the truck safely using jackstands.
  3. If equipped on late-model vehicles, loosen and remove the tank plastic shield.
  4. Loosen the retaining clamp and disconnect the tank filler hose from the tank neck.

If fuel and vapor hoses or pump/sending unit wiring can be accessed at this time, they may be tagged and disconnected. If not, wait for the retaining straps to be loosened and lower the tank slightly for access.
  1. Tag and disconnect and accessible wiring or hoses from the top of the fuel tank.
  2. Have and assistant support the fuel tank, then remove the fuel tank-to-vehicle straps and, if equipped, the isolation strips. If no assistant is available, position a floor jack to support the tank while the straps are removed.
  3. Lower the tank slightly, then remove the sending unit or sending unit/pump wires, hoses and ground strap. Be sure to label all connections to ease installation.
  4. Carefully lower the fuel tank from the vehicle and store in a safe place.


Equipped With Shield Package
  1. Properly drain the fuel tank, then disconnect the negative battery cable.
  2. Raise and support the rear of the truck safely using jackstands.
  3. Remove the shield forward support and bracket.
  4. While supporting the shield and tank assembly with the help of both an assistant and a floor jack, remove the remaining bolts holding the assembly to the frame, then lower it sufficiently for access to the hoses and wires.
  5. Tag and disengage the hoses and wires from the sending unit assembly.
  6. Carefully lower the fuel tank and shield from the vehicle, then if necessary for service or replacement, separate the tank from the shield.


FUEL PUMP REMOVAL & INSTALLATION See Figures 5, 6 and 7

  1. Properly relieve the fuel system pressure.
  2. Connect the negative battery cable.

Be sure to keep a Class B (dry chemical) fire extinguisher nearby.


CAUTION Due to the possibility of fire or explosion, never drain or store gasoline in an open container.

  1. Drain the fuel tank, then remove it from the vehicle. Refer to the procedure found later in this section for details.
  2. Using the GM fuel gauge sending unit retaining cam tool No. J-24187, J-36608 (or equivalent) or a brass drift and a hammer, remove the cam locking ring (fuel sending unit) by twisting counterclockwise. With the locking ring released, carefully lift the sending unit from the fuel tank.
  3. Remove the fuel pump from the fuel sending unit, by performing the following procedures:
    1. Pull the fuel pump up into the mounting tube, while pulling outward (away) from the bottom support.


When removing the fuel pump from the sending unit, be careful not to damage the rubber insulator and the strainer.
    1. When the pump assembly is clear of the bottom support, pull it out of the rubber connector.


To install:
  1. Inspect the fuel pump hose and bottom sound insulator for signs of deterioration, then replace, as necessary.
  2. Push the fuel pump onto the sending tube.
  3. Using a new sending unit-to-fuel tank O-ring, carefully lower the sending unit/fuel pump assembly into the fuel tank.

When installing the sending unit, be careful not to fold or twist the fuel strainer or it may restrict the fuel flow.
  1. Secure the sending unit by turning or driving the lockring clockwise and into position under the tabs.
  2. Install the fuel tank assembly to the vehicle.
  3. Connect the negative battery cable and check for proper pump operation.

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Fig. Fig. 5: A special tool is usually available to remove or install the fuel pump locking cam


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Fig. Fig. 6: A brass drift and a hammer can be used to loosen the fuel pump locking cam



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Fig. Fig. 7: Once the locking cam is released it can be removed to free the fuel pump

Oct 24, 2010 | 1999 GMC Jimmy

3 Answers

Do I have to drop the fuel tank to replace the fuel pump on a 94 Buick le saber


Yes ,,instructions are below, Use eye protection for this procedure
Remove or Disconnect:

  1. Relieve Fuel Pressure
  2. Disconnect negative battery cable
  3. Raise vehicle on hoist
  4. Remove Fuel Tank
  5. Remove Fuel Gage sending and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel gage sender unit.
  6. Disconnect pump wires, hose clamps, and clamp around pump body
  7. Pull pump assembly out of rubber connectors
  8. Inspect fuel pump attaching hose for any signs of deterioration. Replace as necessary.
Install or Connect:

  1. Push fuel pump assembly into attaching hose
  2. Connect pump wires, hose clamps at attaching hose and around pump body
  3. Place Fuel tank sending unit and pump assembly into tank using new O-ring
  4. Place cam lock over assembly and lock by turning clockwise
  5. Install Fuel Tank
  6. Start engine and check fuel pipe connector for visual leaks

Oct 20, 2010 | 1994 Buick LeSabre

1 Answer

How do i replce the fuel pump


  1. Properly relieve the fuel system pressure.
  2. Connect the negative battery cable.
  3. Drain the fuel tank, then remove it from the vehicle. Refer to the procedure found later in this section for details.

    Using the GM fuel gauge sending unit retaining cam tool No. J-24187, J-36608 (or equivalent) or a brass drift and a hammer, remove the cam locking ring (fuel sending unit) by twisting counterclockwise. With the locking ring released, carefully lift the sending unit from the fuel tank.

    Remove the fuel pump from the fuel sending unit, by performing the following procedures:
    1. Pull the fuel pump up into the mounting tube, while pulling outward (away) from the bottom support.



    When removing the fuel pump from the sending unit, be careful not to damage the rubber insulator and the strainer.
      1. When the pump assembly is clear of the bottom support, pull it out of the rubber connector.


    To install:
    1. Inspect the fuel pump hose and bottom sound insulator for signs of deterioration, then replace, as necessary.
    2. Push the fuel pump onto the sending tube.
    3. Using a new sending unit-to-fuel tank O-ring, carefully lower the sending unit/fuel pump assembly into the fuel tank.

    When installing the sending unit, be careful not to fold or twist the fuel strainer or it may restrict the fuel flow.
    1. Secure the sending unit by turning or driving the locking clockwise and into position under the tabs.
    2. Install the fuel tank assembly to the vehicle.
    3. Connect the negative battery cable and check for proper pump operation.
NOTE: A special tool is usually available to remove or install the fuel pump locking cam
A brass drift and a hammer can be used to loosen the fuel pump locking cam
Once the locking cam is released it can be removed to free the fuel pump

Sep 24, 2010 | 1999 Oldsmobile Bravada

1 Answer

How do I change the fuel pump in a 1998 S-10 chevy pickup?


The electric pump is attached to the fuel sending unit, located in the fuel tank.

9b87eff.jpg

Fig. 1: Exploded view of the fuel pump and related components used on TBI equipped models (click for zoom)



REMOVAL & INSTALLATION
  1. Properly relieve the fuel system pressure.
  2. Connect the negative battery cable.
Be sure to keep a Class B (dry chemical) fire extinguisher nearby.

CAUTION Due to the possibility of fire or explosion, never drain or store gasoline in an open container.
  1. Drain the fuel tank, then remove it from the vehicle. Refer to the procedure found later in this section for details.
  2. Using the GM fuel gauge sending unit retaining cam tool No. J-24187, J-36608 (or equivalent) or a brass drift and a hammer, remove the cam locking ring (fuel sending unit) by twisting counterclockwise. With the locking ring released, carefully lift the sending unit from the fuel tank.
  3. Remove the fuel pump from the fuel sending unit, by performing the following procedures:
    1. Pull the fuel pump up into the mounting tube, while pulling outward (away) from the bottom support.
When removing the fuel pump from the sending unit, be careful not to damage the rubber insulator and the strainer.
    1. When the pump assembly is clear of the bottom support, pull it out of the rubber connector.
To install:
  1. Inspect the fuel pump hose and bottom sound insulator for signs of deterioration, then replace, as necessary.
  2. Push the fuel pump onto the sending tube.
  3. Using a new sending unit-to-fuel tank O-ring, carefully lower the sending unit/fuel pump assembly into the fuel tank.
When installing the sending unit, be careful not to fold or twist the fuel strainer or it may restrict the fuel flow.
  1. Secure the sending unit by turning or driving the lockring clockwise and into position under the tabs.
  2. Install the fuel tank assembly to the vehicle.
  3. Connect the negative battery cable and check for proper pump operation.

Hope this helps (/remember to rate and comment this).

Sep 17, 2010 | 1998 Chevrolet S-10 Pickup

1 Answer

Replace a fuel pump on a 1996 cevrolet S-10 4 cylinder


the fuel pump is located inside the fuel tank.

  • Park your Chevy S10 in a safe place with a level surface. Make sure you have enough room to work around the truck.
  • 2 Unplug the fuel pump relay, which is located in the fuse/relay box in the engine compartment on 1995 to 1997 2.2L engine models. Markings on the relay or the back of the fuse box lid should identify the relay. On other models, press the small stem inside the Schrader valve--similar to a bicycle-tire valve--located on the fuel inline rail, right before the first fuel injector. Cover the valve with a shop rag as you depress the stem with a small screwdriver to catch the squirt of fuel.
  • 3 Disconnect the black, negative battery cable and raise the rear of the truck with a floor jack. Safely support it on two jack stands.
  • 4 Drain the fuel tank into an approved container through the filler pipe. Use a hand siphon pump if necessary.
  • 5 Disconnect the clamp from the filler hose at the tank with a screwdriver and remove the hose. Remove the tank shield. Support the fuel tank with a floor jack and a piece of wood on the jack pad to avoid damage to the tank.
  • 6 Remove the tank-holding straps with a ratchet and socket.
  • 7 Lower the fuel tank so you can disconnect the fuel lines from the fuel pump/sending unit assembly on top of the tank. Unplug the pump electrical connector and lower the tank to the floor.
  • 8 Turn the lock-ring tabs holding the pump/sending unit assembly to the tank counterclockwise with a drift punch and a soft hammer until the ring is released.
  • 9 Lift the pump/sending unit assembly off the tank, remove the pump and install the new pump in the pump/sending unit assembly. Discard the pump/sending unit O-ring seal.
  • 10 Install a new pump/sending unit O-ring and set the pump assembly in the tank.
  • 11 Lock the assembly lock ring by turning the ring clockwise until it locks in place.
  • 12 Connect the fuel lines to the to the fuel/sending unit assembly and plug the pump electrical connector.
  • 13 Raise the tank to its mounting position and install the tank-holding straps. Install the tank shield and connect the filler neck to the tank.
  • 14 Lower the truck, plug the fuel-pump relay and connect the black, negative battery cable.
  • 15 Refill the fuel tank, start the engine and check for leaks.
  • Sep 11, 2010 | 1997 Chevrolet S-10 Pickup

    2 Answers

    Where is a fuel pump located, for 1994 villager mercury


    In the tank!!!

    Removal
    CAUTION Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.


    The fuel pump and fuel tank sending unit are removed as an assembly.
    1. Remove the fuel tank. Please refer to Fuel Tank, Removal and Installation for the procedure.
    2. Clean the area around fuel pump.
    3. Remove the six fuel pump bolts.

      WARNING The fuel pump and fuel tank sending unit assembly must be tilted to remove it from the fuel tank. Do not lift the assembly straight out of the tank, or damage may occur to the sending unit.

    4. Lift the fuel pump and fuel tank sending unit assembly from the fuel tank and discard the gasket.


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    Apr 18, 2010 | 1994 Mercury Villager

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