Sierra, Silverado 2006-2007

Fuel Pump


Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions section.
  3. Remove or disconnect the following:

    Negative battery cable

  5. Relieve the fuel system pressure.
  7. Drain the fuel tank.
  9. Remove or disconnect the following:
    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 tank

    Click image to see an enlarged view

    Fig. Exploded view of the fuel pump assembly mounting


    Fuel sender assembly retaining ring using a fuel tank sending unit wrench. Remove the fuel sender assembly and the seal. Discard the seal.

  11. 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

  13. Squeeze the locking tangs and remove the fuel level sensor.
  15. Remove the fuel pressure sensor.

To install:

  1. Install or connect the following:
    Always install a new fuel strainer when replacing the fuel tank fuel pump module.

    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 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

    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

    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).

  3. Refill the fuel tank. Install the fuel filler cap. Connect the negative battery cable.
  5. Turn the ignition ON for 2 seconds.
  7. Turn the ignition OFF for 10 seconds.
  9. Turn the ignition ON .
  11. Inspect for fuel leaks.