Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005

Removal & Installation

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NOTE
On 2005 gasoline engines the fuel filter is integral with the fuel pump/sender assembly in the fuel tank.

The fuel filter is normally located along the frame rail of the vehicle. On some vehicles however, it may have been relocated to the engine compartment. When in doubt, trace a fuel line from the engine backwards or from the tank forward in order to locate the filter.

Some vehicles utilize a spin-on fuel filter located on the frame rail. This filter can be turned counterclockwise after the fuel pressure is relieved.

Click image to see an enlarged view

Fig. The spin-on fuel filter is serviced in the same manner as a spin-on oil filter-1999 vehicles



Click image to see an enlarged view

Fig. Typical in-line fuel filter mounting location-1999 vehicles

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Properly relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Fuel line connections from the filter or unscrew the filter in the case of the spin-on type
     
    In line filters, remove the bolt from the filter mounting clamp, then remove the clamp and filter assembly. Separate the filter from the clamp.
     

  6.  

To install:


NOTE
The inline filter has an arrow (fuel flow direction) on the side of the case, be sure to install it correctly in the system, with the arrow facing away from the fuel tank.

  1. Install or connect the following:

    In line filters place filter in clamp
     
    Install filter and clamp
     
    Spin-on filters, lubricate the gasket before installation. Then tighten the filter an additional 3 / 4 of a turn from the point when the gasket touches the filter adapter. Always check for leaks after a new filter is installed.
     

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Relieve the fuel system pressure.
  6.  
  7. Raise the vehicle.

    Click image to see an enlarged view

    Fig. Fuel filter-4.8L, 5.3L and 6.0L engines-2000-01 vehicles

  8.  
  9. Clean all the fuel filter connections and the surrounding areas before disconnecting the fuel pipes in order to avoid possible contamination of the fuel system.
  10.  
  11. Disconnect the threaded fittings from the fuel filter.
  12.  
  13. Cap the fuel pipes in order to prevent possible fuel system contamination.
  14.  
  15. Slide the fuel filter from the bracket.
  16.  
  17. Inspect the fuel pipe O-rings for cuts, nicks, swelling, or distortion. Replace the O-rings if necessary.
  18.  

To install:

  1. Slide the fuel filter into the bracket. Remove the caps from the fuel pipes.
  2.  
  3. Connect the threaded fittings to the fuel filter. Tighten the fittings to 18 ft. lbs. (25 Nm).
  4.  
  5. Lower the vehicle.
  6.  
  7. Tighten the fuel filler cap.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Turn the ignition ON for 2 seconds.
  12.  
  13. Turn the ignition OFF for 10 seconds.
  14.  
  15. Turn the ignition ON .
  16.  
  17. Inspect for fuel leaks.
  18.  

On gasoline engines, the fuel filter is integral with the fuel pump/sender assembly in the fuel tank. Refer to the Fuel Pump removal procedure.

5.3L Flex Fuel Engine




NOTE
This procedure requires the use of tool J-46363, Fuel Line Release Tool, or equivalent.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Relieve the fuel system pressure.
  6.  
  7. Raise the vehicle.
  8.  
  9. Remove the fuel composition sensor bracket nuts and reposition it aside.
  10.  
  11. Clean all the fuel filter connections and the surrounding areas before disconnecting the fuel pipes in order to avoid possible contamination of the fuel system.
  12.  
  13. Using a flare nut wrench and backup wrench disconnect the fuel line fitting from the fuel filter.
  14.  
  15. Use the Fuel Line Release Tool, J46363, or equivalent to disconnect the quick connect fittings as follows:
    1. Pull the quick connect fitting back until the internal retainers hit the filter stop.
    2.  
    3. Twist one end of J-46363 and insert it between the fitting and the filter
    4.  
    5. Twist the opposite end of the tool and insert it between the fitting and filter
    6.  
    7. Once tool J-46363 is inserted, make sure it is parallel to the filter and fitting.
    8.  
    9. While holding the filter, push the fitting toward the filter in order to disconnect the quick connect fitting.
    10.  
    11. Remove the fitting from the filter. Remove the tool from the filter.
    12.  

  16.  
  17. Slide the fuel filter from the bracket.
  18.  
  19. Inspect the fuel pipe O-rings for cuts, nicks, swelling, or distortion. Replace the O-rings if necessary.

    Click image to see an enlarged view

    Fig. Twist one end of the fuel line release tool and insert it between the fitting and the fuel filter-5.3L Flex Fuel engine

  20.  

To install:

  1. Slide a NEW fuel filter into the bracket.
  2.  
  3. While holding the filter, push the fitting towards the filter in order to connect the quick connect fitting.
  4.  
  5. Using a flare nut wrench and backup wrench connect the fuel line fitting to the fuel filter.
  6.  
  7. Position the fuel composition sensor/bracket into place and secure with the bracket nuts. Torque the nuts to 13 ft. lbs. (17 Nm).
  8.  
  9. Lower the vehicle
  10.  

6.5L Engine



  1. Turn the ignition OFF . Remove the fuel tank cap to release any pressure or vacuum in the tank.
    NOTE
    It is not necessary to drain all the fuel from the header in order to change the element since the fuel will remain in the header's cavity.



    Click image to see an enlarged view

    Fig. Exploded view of the fuel filter assembly-6.5L diesel engines

  2.  
  3. Remove or disconnect the following:

    Open the air bleed valve to relieve residual pressure
     
    Element nut, turning it by hand to the left. If necessary, a strap wrench may be used to loosen the nut.
     
    Element by lifting straight up and out of the header assembly
     

  4.  

To install:

  1. Be sure the mating surface between the element assembly and the header assembly is clean.
  2.  
  3. Install or connect the following:

    New element by aligning the widest key slot located under the element assembly cap with the widest key in the header assembly.
     

  4.  
  5. Carefully push the element downward until the mating surfaces make contact.

    Element nut and tighten securely by hand
     

  6.  
  7. If not already done, open the air bleed valve on top of the fuel manager/filter assembly, then connect a length of hose placing the other end in a suitable container.
    CAUTION
    Be extremely cautious when handling diesel fuel. Do not expose the fuel to sparks or open flames. Also, be cautious as the fuel coming out of the drain hose could be hot.

  8.  
  9. Disconnect the fuel injection pump shutdown solenoid wire.
  10.  
  11. Crank the engine for 10-15 seconds, then wait 1 minute for the starter motor to cool. Repeat until clear fuel is observed coming from the air bleed.
  12.  
  13. Close the air bleed valve, reconnect the injection pump solenoid wire and replace the fuel tank cap.
  14.  
  15. Start the engine, allow it to idle for 5 minutes and check the fuel manager/filter assembly for leaks.
  16.  

6.6L Engine



  1. Disconnect the negative battery cables.
  2.  
  3. Drain the fuel from the fuel filter as follows:
    1. Install a hose on the water drain on the water-in-fuel sensor.
    2.  
    3. Place the other end of the hose into an approved container.
    4.  
    5. Drain as much fuel as possible from the fuel filter housing.
    6.  
    7. Tighten the water drain on the water-in-fuel sensor.
    8.  

  4.  
  5. Remove or disconnect the following:

    Water-in-fuel sensor harness connector
     
    Fuel filter from the fuel filter/heater element housing
     
    Water-in-fuel sensor from the fuel filter

    Click image to see an enlarged view

    Fig. Exploded view of the fuel filter (2)-6.6L engine

     

  6.  

To install:

  1. Install or connect the following:
    NOTE
    Check the fuel filter/heater element housing and the filter for a dislocated filter seal or foreign debris. Contamination on the filter/heater housing may cause leakage at the fuel filter. Coat the seal with clean engine oil.



    Water-in-fuel sensor in the fuel filter
     



    Fuel filter on the fuel filter/heater element housing
     
    Water-in-fuel harness connector
     
    Negative battery cables
     

  2.  
  3. Prime the fuel system:
    1. Pump the primer located on top of the fuel filter 30 times or until stiff.
    2.  
    3. Try to start and run the engine. If the engine does not start, repeat the previous step.
    4.  
    5. Allow the engine to run for 5 minutes at idle.
    6.  
    7. Check for fuel leaks and clear all Diagnostic Trouble Codes (DTCs).
    8.  

  4.  

Except 5.3L Flexible Fuel Engine (L59)




NOTE
On 2005-06 gasoline engines except 5.3L Flex Fuel the fuel filter is integral with the fuel pump/sender assembly in the fuel tank.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Relieve the fuel system pressure.
  6.  
  7. Raise the vehicle.

    Click image to see an enlarged view

    Fig. Fuel filter-2002-04 4.8L, 5.3L and 6.0L engines

  8.  
  9. Clean all the fuel filter connections and the surrounding areas before disconnecting the fuel pipes in order to avoid possible contamination of the fuel system.
  10.  
  11. Disconnect the threaded fittings from the fuel filter.
  12.  
  13. Cap the fuel pipes in order to prevent possible fuel system contamination.
  14.  
  15. Slide the fuel filter from the bracket.
  16.  
  17. Inspect the fuel pipe O-rings for cuts, nicks, swelling, or distortion. Replace the O-rings if necessary.
  18.  

To install:

  1. Slide the fuel filter into the bracket. Remove the caps from the fuel pipes.
  2.  
  3. Connect the threaded fittings to the fuel filter. Tighten the fittings to 18 ft. lbs. (25 Nm).
  4.  
  5. Lower the vehicle.
  6.  
  7. Tighten the fuel filler cap.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Turn the ignition ON for 2 seconds.
  12.  
  13. Turn the ignition OFF for 10 seconds.
  14.  
  15. Turn the ignition ON .
  16.  
  17. Inspect for fuel leaks.
  18.  

 
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