Envoy, Rainer, Trailblazer 2006-2007

Fuel Pressure Regulator

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Removal & Installation



The fuel system is a returnless, on-demand design. The fuel pressure regulator is contained in the fuel sender assembly inside the fuel tank.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Properly relieve the fuel system pressure.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Remove the fuel filler cap, if not already done.
  8.  
  9. Remove the fuel pump assembly.
  10.  
  11. Remove the fuel pressure regulator from the fuel pump assembly. Replace the seal(s) or O-ring(s).

    Click image to see an enlarged view

    Fig. Fuel pressure regulator (2) and O-ring assembly (1)-4.2L engine shown, others similar

  12.  

To install:

  1. Install the new fuel pressure regulator to the fuel pump assembly along with new seal(s) or O-ring(s).
  2.  
  3. Install the fuel pump assembly.
  4.  
  5. Install the fuel filler cap.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Start the engine and check for leaks.
  10.  

 
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