Where is the fuel pump and sending unit located and how do you get to it?

Fuel pump is located inside the fuel tank. Look in trunk under rug or Remove the back seat and under it you should find an access cover to get to the fuel tank sending unit. (the cover will be SCREWED in place). Remove cover, remove the sending unit and the fuel pump is installed on the sending unit

most vehicles after the mid 80's (fuel injected) have the fuel pump located on the sending unit in the fuel tank. you have to drop the tank and remove the sending unit to get at it.

1. The Fuel Level Sending Unit, or Fuel Level Sensor, is located in your gas tank with the Fuel Pump Module. The fuel gauge sending unit (fuel level sensor) is attached to the side of the fuel pump module. The sending unit consists of a float, an arm, and a variable resistor track (card).
2. The Fuel Pressure Regulator is located within fuel pump module. The fuel pressure regulator controls fuel system pressure. The PCM cannot detect a clogged fuel pump inlet filter, clogged in-line fuel filter, or a pinched fuel supply or return line. However, these could result in a rich or lean condition causing the PCM to store an oxygen sensor or fuel system diagnostic trouble code.

Both of these sensors are connected with the Fuel Pump Module. Here is a diagram:


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The fuel "level" sending unit is located on the side of the fuel pump module, see red arrow on picture below. The fuel tank will need to be dropped and the fuel pump module removed in order to replace the fuel level sending unit. You can expect to pay a couple hours of labor to remove the tank and replace the level sending unit.


the fuel tank pressure sensor is located on top of the fuel pump module. The fuel tank will still need to be lowered to get at it but the fuel pump module does not need to be removed from the tank to replaced it.

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its inside the gas tank

in the fuel tank

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.

it is located in the fuel sending unit at the top of the tank. You have to remove the tank to get to it.

The fuel sending unit is part of the fuel pump .

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

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 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.

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


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