Question about 2006 GMC Sierra 1500 2WD

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Sending unit problem

How do you replace the fuel sending unit

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You have to remove the fuel tank to get access to fuel pump and sending unit
sending unit problem - 3100a209-5c1f-41e3-809a-97db299f5771.gif

hope it helps

Posted on Apr 01, 2014

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You will need to drop the fuel tank because the fuel pump is inside the tank.

Posted on Mar 31, 2014

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2007 grand prix replaced fuel pump assy now fuel gauge reads full only


If you replaced the fuel pump then one of two things probably happened. Recheck the electrical connection on the sending unit or your sending unit was damaged when you replaced the fuel pump. The sending unit is the float/arm device (like a toilet) that sends a resistive signal to your fuel gage. Depending on the vehicle, some failed sending units read full when bad and some read empty when bad. Did you bend the arm of the sending unit when you removed the fuel pump? Did the float happen to stick in a particular spot? The easiest thing is to check your connections at the tank. Most vehicles have two electrical connectors. One for the fuel pump and one for the sending unit. If you are satisfied that the connectors are fine then I would recommend dropping the tank again and inspecting your sending unit. It is virtually impossible to connect the sending unit to the fuel pump cable and vs. versa. Some vehicles have only one electrical connector for both. Sorry but that is the best answer than I can give you.

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I have a 1991 ford ranger fuel gauge stays on full all the time and tank is empty does not go down ever?


You need a new sender unit and pump. If you take it out, you can check if the float has come off the stalk?

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1 Answer

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1 Answer

How to replace fuel sending unit


Hi Shelly,the fuel sending unit is intregated with fuel pump,so you will have to remove fuel pump to replace fuel sending unit,some new pumps come with fuel sending unit.They can be replaced separately,here's how.

Dec 22, 2012 | 2000 Ford Escort

1 Answer

1996 ford f150 front gas tank gauge reads empty but tank is full pump in front tank was replaced about a year ago what could problem be


When pump was replaced, did you also replace sending unit? It is usually a good idea to replace sending unit when replacing pump. The sending unit also "sends" information about the fuel level to your fuel gage. It is also possible the float on the sending unit is stuck in the low fuel or empty position on the sending unit. Although on some vehicles you can replace individual parts of the fuel delivery system, it is usually a good idea to replace all the internal parts of the sending unit assembly at the same time. After all, most fuel tanks can be a real pain to gain access to the inner workings of the fuel delivery system, so why take the chance of having to gain access again.
Good luck.

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2 Answers

Is there a fuel relay that could be going bad


The problem is caused by a defective fuel level sending unit inside the gas tank, it is very common and caused by the chemicals in the new cleaner burning motor vehicle fuels eating up the insulator on the sending unit. To replace the sending unit requires the fuel tank be removed, the sending unit is part of the fuel pump module and all are replaced as one unit.

Feb 02, 2012 | 1999 Chevrolet Blazer

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

Dealer replaced fuel pump and fuel sending unit in 2006 Volvo S60


There was no need for them to replace the fuel pump unless it was in one assembly with the fuel pick-up & fuel gauge sending unit. I sounds like they installed a factory defective replacement pump or did a defective installation job. Have them put a different new fuel pump to see if the one they put in was a factory dud.

Apr 09, 2010 | 2002 Volvo S60

1 Answer

01 Chev Silverado 4.8L fuel light comes on when fuel tank is full


The fuel gauge sending unit which sends a signal to the gauge is stuck or defective. It’s in the fuel tank.

Buy 2 containers of Chevron Techron at Wal-Mart and add to the fuel tank. Sulfur deposits build up on the sending unit. I own a Corvette and many of us owners have had to add the Techron to cure the fuel gauge problem.

If that doesn’t take care of it, more than likely the fuel level sending unit has gone bad, it is inside the tank and is a variable resistor connected to a float. Chevy and GMC trucks in the 99-2003 era have had a bad problem with this. The sending unit can be replaced apart from the pump but this is not a job for a beginner.

It’s best to replace pump and sending unit at the same time. If you only replace sending unit, pump will usually fail soon after that creating extra expense

Mar 12, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

How do i replace the fuel pump in my 1993 mazda 626 2.5


1. Relieve the fuel pressure and disconnect the negative battery cable.

2. If not already removed, depress the clips on each end of the rear seat cushion and remove the cushion.

3. If not already done, detach the electrical connector from the fuel pump/sending unit.

4. Remove the attaching screws from the fuel pump/sending unit access cover and remove the cover.

5. Disconnect the fuel supply and return hoses from the fuel pump/sending unit.

6. Remove the attaching screws and the fuel pump/sending unit from the fuel tank.

7. Detach the sending unit electrical connector, remove the sending unit attaching nuts and remove the sending unit from the fuel pump assembly.



To install:

1. Attach the sending unit to the fuel pump assembly and install the nuts. attach the sending unit electrical connector.

2. Install the fuel pump/sending unit into the fuel tank with a new gasket and install the mounting screws.

3. Connect the fuel supply and return lines.

4. Install the access cover and the mounting screws.

5. Attach the sending unit electrical connector.

6. Position the rear seat cushion over the floor, making sure to align the retaining pins with the clips. Push down firmly until the two retaining pins are locked into the rear seat retaining clips.

7. Connect the negative battery cable, start the engine and check for proper system operation and for fuel leaks.

Jun 13, 2009 | 1993 Mazda 626

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