H3 2006

Relieving Fuel System Pressure

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CAUTION
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.


CAUTION
Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.

With CH 48027



Specific to:

Hummer H3 2006-2010

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover, if required.
  4.  
  5. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
  6.  
  7. Remove the fuel rail service port cap.
    CAUTION
    Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gage. Place the towel in an approved container when the connection of the fuel pressure gage is complete.

  8.  
  9. Wrap a shop towel around the fuel rail service port.
  10.  
  11. Connect the J 42242 to the fuel rail service port.
  12.  
  13. Connect the CH-48027-3 (4) to the J 42242.
  14.  
  15. Connect the CH-48027-2 (2) to the CH-48027-3 (4).
  16.  
  17. Place the hose on the CH-48027-2 (2) into an approved gasoline container.
  18.  
  19. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail.
  20.  
  21. Close the valve on the CH-48027-2 (2).
  22.  
  23. Remove the hose on the CH-48027-2 (2) from the approved gasoline container.
    WARNING
    Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system: the fuel pipe connections, the hose connections, the areas surrounding the connections.

  24.  
  25. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Pressure gage and adapter

  26.  

Without CH 48027



Specific to:

Hummer H3 2006-2010

  1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse.
  2.  
  3. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
  4.  
  5. Remove the engine cover, if required.
  6.  
  7. Remove the fuel rail service port cap.
  8.  
  9. Wrap a shop towel around the fuel rail service port and using a small flat-bladed tool, depress (open) the fuel rail test port valve.
  10.  
  11. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
  12.  
  13. Install the fuel rail service port cap.
  14.  
  15. Install the engine cover, if required.
  16.  
  17. Tighten the fuel fill cap.
  18.  

 
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