Question about 2000 GMC Safari

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Will I have to drop the fuel tank to install a new pump and sender on my 01 gmc 1500?

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YES. sometimes its easier if you can lift the bed off, (your talking about 1500, not Safari, right?)

Posted on Sep 29, 2009

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1995 GMC JIMMY WONT START UNLESS I PRIME IT THEN IT JUST DIES ITS FUEL INJECTED


It sounds like you have a defective fuel pump. The pump is locate inside the fuel tank, the fuel tank must be removed to replace the pump. Please follow this procedure to remove the fuel tank.
Disconnect neg battery cable, safely raise vehicle, place floor jack under tank, loosen gas tank straps and allow tank to slowly drop halfway, disconnect( this is the hard part) fuel lines,and power connections at tank. Drop tank. With a brass hammer/punch carefully remove retaining ring/seal.Reverse to install.A new pump module will cost you $300-$400 at the dealer. Don't use a cheap pump replace the entire assembly because this is a float/sender/pump/ in one. Replace your fuel filter too or the fuel pump warranty is voided..

Jun 20, 2012 | 1995 GMC Jimmy

1 Answer

Location of and how to remove and replace - 2002 DeVille Sending Unit/Fuel Pump Module (4.6L engine)


These units are in the tank and must be dropped in order to replace.


WARNING 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.

  1. Relieve the fuel system fuel pressure, as outlined in the Fuel System Section.
  2. Drain the fuel tank to at most 3/4 of a tank full.
  3. Raise the vehicle.
  4. Remove the fuel tank.
    NOTE The modular fuel sender support assembly will spring-up when the locking ring is moved.
  5. Remove the fuel sender assembly using tool J39765 Fuel Sender Locknut Wrench or an equivalent.
  6. Note the position of the fuel sender strainer for installation.
  7. Support the reservoir with one hand and grasp the fuel sender strainer with the other hand.
  8. Pull the external fuel sender strainer off of the fuel sender.
  9. Inspect the fuel sender strainer. If the fuel sender strainer is contaminated, the fuel tank should be cleaned.
  10. Discard the fuel sender strainer after inspection.
  11. Disassemble the electrical connectors from the fuel level sensor assembly of the fuel pump and cover assembly.
  12. Disassemble the fuel level sensor assembly.

    0996b43f802054cc.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Fuel level sending unit on fuel sender (fuel pump) module.


To install:
  1. Assemble the fuel level sensor assembly.
  2. Assemble the electrical connectors to the fuel pump and cover assembly.
  3. Position the new fuel sender strainer on the modular fuel sender and push on the outer edge of the fuel sender strainer until the fuel sender strainer is fully seated on to the sender assembly.
  4. Install the fuel sender assembly into the fuel tank using tool J39765 Fuel Sender Locknut Wrench or an equivalent.
  5. Reinstall the fuel tank.
  6. Lower the vehicle.
  7. Add fuel to the fuel tank.
  8. Connect the negative battery cable.
  9. Reinstall the fuel tank filler pipe cap.
  10. Inspect for fuel leaks.
  11. Turn the ignition switch ON for 2 seconds.
  12. Turn the ignition switch OFF for 5 seconds.
  13. Turn the ignition switch ON .
  14. Check for fuel leaks.

Oct 26, 2010 | 2002 Cadillac Deville

2 Answers

My fuel pump went out again in my truck. I had it done the first time and was told it was quite the chore. This time I don't have the 600$ to have it done again so I'm going to try it myself. I need a...


Fuel Pump Removal & Installation Main To Remove:
  1. Disconnect battery negative cable.
  2. Relieve fuel system pressure.
  3. Raise and safely support vehicle.
  4. Remove fuel tank.
  5. Remove fuel sender assembly by turning cam lock counterclockwise. gm-04-00-954.gif

  6. Remove fuel sender assembly from fuel tank.
To Install:
  1. Using NEW O-ring seal, Install fuel pump sender to fuel tank.
  2. Install cam lock assembly and turn clockwise to lock.
  3. Install fuel tank.
  4. Cycle ignition switch OFF and OFF and check for fuel leaks.
Balance 7.4L To Remove:
  1. Disconnect battery negative cable.
  2. Relieve fuel system pressure.
  3. Disconnect electrical connector.
  4. Clean both fuel pipe connections and area surrounding fuel pump to avoid contamination of fuel system. gm-05-74-997.gif

  5. Disconnect fuel pipes at fuel pump.
  6. Slide fuel pump out of bracket.
To Install:
  1. Install NEW O-ring seals on fuel pipes.
  2. Position pump in pump bracket.
  3. Connect fuel feed and suction pipes to pump.
    • Torque to: 22 ft lbs. (30 Nm).
  4. Connect electrical connector.
  5. Connect battery negative cable.
  6. Cycle ignition switch OFF and OFF and check for fuel leaks.
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Oct 13, 2010 | 1997 GMC Sierra

1 Answer

My 1999 GMC Sierra 1500 has an intermittent gearshift indicator light on or black problem. We have checked and cleaned the ground points. Also, the gas gauge is inconsistent...even when the tanked is...


It would be nice to get a little more detail on the intermittent light - you say "intermittent gearshift indicator light on or black problem" - Would it be ok if you elaborate a little more? Thanks.

As for your fuel gauge - you will be needing a new sender unit. Someone liked to keep the tank full all the time, so the wiper that moves across carbon strips wore them out just on that part. Thats why when your fuel quantity goes down, the wiper moves down to a good part of the sender board.

Ford is real proud of that sender unit - $140.

You can buy one on eBay for about $80 shipped to your door --

Oct 06, 2010 | 1999 GMC Sierra

1 Answer

How do you replace a GMC Yukon Denali fuel pump? And where is it located on the Denali?


Fuel Pump
Removal & Installation
To Remove:


  1. Remove the fuel tank.
  2. Disconnect the fuel lines.
  3. Using the J 45722 or equivalent, remove the sending unit lock ring.






    chevy_aval15_02-04_j44402.gif



  4. Remove the sending unit and seal.
  5. Discard the seal.
    CAUTION
    Drain the fuel from the fuel sender assembly
    into an approved container in order to reduce the risk of fire and personal
    injury. Never store the fuel in an open container.

  6. Clean sealing surfaces.

To Install:

CAUTION
In order to reduce the risk of fire and
personal injury that may result from a fuel leak, always replace the fuel sender
gasket when reinstalling the fuel sender assembly.


  1. Install a NEW seal.
    CAUTION
    The fuel pump strainer must be in a
    horizontal position when the sending unit is installed in the tank. When
    installing the sending unit, assure that the fuel pump strainer does not block
    full travel of the float arm.

  2. Install the sending unit into the fuel tank.
  3. Using J 45722 or equivalent, install the sending unit lock ring.
  4. Connect the fuel lines to the sending unit.
  5. Install the fuel tank.


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Sep 23, 2010 | 2000 GMC Yukon Denali

1 Answer

How do I change a fuel pump on a 2002 yukon


Need to know the size of the engine but this is a picture of what it is....


Posting the rest of the directions for you:


1cf4b2b.gif
Illustrating fuel pump and sending unit sensor (3) on 2000-2004 4.8L, 5.3L, 6.0L Engines

Removal & Installation
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Remove or disconnect the following:
    • Negative battery cable
  3. Relieve the fuel system pressure.
  4. Drain the fuel tank.
  5. Remove or disconnect the following:
    • Fuel tank

    WARNING Do not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage tool Joints.

  6. Disconnect the fuel and evaporative emission (EVAP) lines from the fuel tank module.
  • Fuel sender assembly retaining ring using a fuel tank sending unit wrench. Remove the fuel sender assembly and the seal. Discard the seal.
  • Note the position of the fuel strainer on the fuel sender. Support the fuel sender assembly with one hand and grasp the strainer with the other hand. Pull the strainer off the fuel sender. Discard the strainer after inspection. Inspect the strainer. Replace a contaminated strainer and clean the fuel tank.
  • Fuel pump electrical connector
  • Electrical connector retaining clip from the fuel level sensor
  • Sensor electrical connector from under the fuel sender cover
  • Fuel level sensor retaining clip
  • Squeeze the locking tangs and remove the fuel level sensor.
  • Remove the fuel pressure sensor.
  • To install:
    1. Install or connect the following:
      • Fuel pressure sensor
      • Fuel level sensor
      • Sensor retaining clip
      • Electrical connector to the fuel level sensor
      • Electrical connector retaining clip to the fuel level sensor
      • Fuel pump electrical connector

      NOTE Always install a new fuel strainer when replacing the fuel tank fuel pump module.

      • New fuel strainer in the same position as noted during disassembly. Push the strainer on the bottom of the fuel sender until the strainer is fully seated.
      • New seal on the fuel tank

      NOTE The fuel pump strainer must be in a horizontal position when the fuel sender is installed in the tank. When installing the fuel sender assembly, assure that the fuel pump strainer does not block full travel of the float arm.

      • Fuel sender assembly into the fuel tank
      • Fuel sender assembly retaining ring
      • Fuel tank. Install the fuel tank strap attaching bolts. Tighten the bolts to 30 ft. lbs. (40 Nm).
    2. Refill the fuel tank. Install the fuel filler cap. Connect the negative battery cable.
    3. Turn the ignition ON for 2 seconds.
    4. Turn the ignition OFF for 10 seconds.
    5. Turn the ignition ON.
    6. Inspect for fuel leaks.

    Sep 13, 2010 | 2002 GMC Yukon Denali

    1 Answer

    How do I remove fuel pump off 01 olds silhouette. Dropped the tank down already


    2001 Oldsmobile Truck Silhouette 3.4L SFI 6cyl
    Fuel Pump - Removal & Installation
    1. Before servicing the vehicle, refer to the Precautions Section.
    2. Properly relieve the fuel system pressure.
    3. Drain and remove the fuel tank from the vehicle
    4. Remove or disconnect the following:
      Negative battery cable Quick-connect fittings at the fuel pump Fuel pump locking nut with a Fuel Pump Spanner Wrench J 39348 Fuel pump assembly from the fuel tank and discard the O-ring
    To install:
    1. Install or connect the following:
      New O-ring on the fuel tank Fuel pump into the fuel tank making certain not to fold or twist the strainer and that it does not interfere with the full travel of the float arm Fuel pump locking nut with the scanner tool Quick-connect fittings at the fuel pump Fuel tank and fill the tank Negative battery cable
    2. Prime the fuel system as follows:
      1. Turn the ignition switch ON for two seconds.
      2. Turn the ignition switch OFF for 10 seconds.
      3. Turn the ignition switch ON and checks for leaks. Repair if necessary.


    Fuel Pump/SenderRemoval & Installation
    1. Before servicing the vehicle, refer to the Precautions Section.
    2. Properly relieve the fuel system pressure.
    3. Disconnect the negative battery cable.
    4. Drain the fuel tank into an approved container.
      WARNING Do not attempt to straighten any kinked nylon fuel lines. Replace any kinked nylon fuel feed or return pipes in order to prevent damage to the vehicle.
      WARNING Do not attempt to repair sections of nylon fuel pipes. If the nylon fuel pipes are damaged, replace the pipes.
    5. Raise the vehicle.

      1edb6c2.jpg
      Fig. Showing the fuel tank assembly and related components
    6. Disconnect the fuel supply pipe (5) quick-connect fitting.
    7. Disconnect the evaporative emission (EVAP) purge pipe (6) quick connect fitting at the EVAP canister.
    8. Loosen the fuel tank filler pipe hose clamp.
    9. Disconnect the fuel tank filler from the fuel tank.
    10. Disconnect the vapor recirculation pipe from the filler tube.
    11. Remove the fuel tank shield.
    12. With the aid of an assistant, support the fuel tank.
    13. Remove the fuel tank strap attaching bolts.
    14. Disconnect the fuel sender and the fuel tank pressure (FTP) sensor electrical connectors at the body pass through.
    15. Remove the fuel tank from the vehicle.
    16. Remove the fuel sender assembly (3).

      f523c95.jpg
      Fig. Identifying the fuel sender assembly
    17. Disconnect the fuel sender electrical connections (3).
    18. 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.
    19. Disconnect the fuel supply pipe quick-connect fitting (4) at the fuel sender assembly.
    20. Disconnect the evaporative emission (EVAP) pipe quick-connect fittings (5, 6) at the fuel sender assembly.
      CAUTION Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

    continue...

    Jun 23, 2010 | 2002 Oldsmobile Silhouette

    1 Answer

    I have a 2000 GMC Sierra extended cab Z71 and my fuel gauge fluctuates.It takes it a while to register it has fuel and then it will just drop to empty then bounce back up. I was wondering what could cause...


    The fuel sender is built on to the fuel pump. This happens sometimes if you run the tank low alot Try keeping the truck above 1/2 tank see if this helps otherwise you might need a new fuel pump

    Dec 27, 2009 | 2000 GMC New Sierra 1500

    1 Answer

    Replace fuel pump for 2002 gmc sierra 2500


    First...this is where the pump is (gas tank) on the engines listed:

    6f9f9d7.gif

    Illustrating fuel pump and sending unit sensor (3) on 1999-2005 4.8L, 5.3L, 6.0L Engines


    Removal & Installation
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Remove or disconnect the following:
      • Negative battery cable
    3. Relieve the fuel system pressure.
    4. Drain the fuel tank.
    5. Remove or disconnect the following:
      • Fuel tank
    8e4564e.gif
    WARNING 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.

    • Fuel sender assembly retaining ring using a fuel tank sending unit wrench. Remove the fuel sender assembly and the seal. Discard the seal.
  • Note the position of the fuel strainer on the fuel sender. Support the fuel sender assembly with one hand and grasp the strainer with the other hand. Pull the strainer off the fuel sender. Discard the strainer after inspection. Inspect the strainer. Replace a contaminated strainer and clean the fuel tank.
    • Fuel pump electrical connector
    • Electrical connector retaining clip from the fuel level sensor
    • Sensor electrical connector from under the fuel sender cover
    • Fuel level sensor retaining clip
  • Squeeze the locking tangs and remove the fuel level sensor.
  • Remove the fuel pressure sensor.
  • To install:
    1. Install or connect the following:
      • Fuel pressure sensor
      • Fuel level sensor
      • Sensor retaining clip
      • Electrical connector to the fuel level sensor
      • Electrical connector retaining clip to the fuel level sensor
      • Fuel pump electrical connector
      NOTE Always install a new fuel strainer when replacing the fuel tank fuel pump module.

      • New fuel strainer in the same position as noted during disassembly. Push the strainer on the bottom of the fuel sender until the strainer is fully seated.
      • New seal on the fuel tank
      NOTE The fuel pump strainer must be in a horizontal position when the fuel sender is installed in the tank. When installing the fuel sender assembly, assure that the fuel pump strainer does not block full travel of the float arm.

      • Fuel sender assembly into the fuel tank
      • Fuel sender assembly retaining ring
      • Fuel tank. Install the fuel tank strap attaching bolts. Tighten the bolts to 30 ft. lbs. (40 Nm).
    2. Refill the fuel tank. Install the fuel filler cap. Connect the negative battery cable.
    3. Turn the ignition ON for 2 seconds.
    4. Turn the ignition OFF for 10 seconds.
    5. Turn the ignition ON.
    6. Inspect for fuel leaks

    Oct 25, 2009 | 2002 GMC Sierra 1500

    1 Answer

    Replace fuel pump 2002 GMC Sierra


    I don't think there is enought slack to drop the tank without unhooking the lines. You can take this advise if you want or not its up to you, but i always found it easier to unbolt the bed and lift it back about a foot and i could get right at the sender where the pump is and in some cases i dident even have to unhook the fuel lines, pull the sending unit out chg. the pump and put it back together. Or you can do it the other way, unhook the lines, electrical wires, filler hose, and straps, if its got gas in it better have some help 8# a gal. adds up.

    May 26, 2009 | 2002 GMC Sierra 1500

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