Q: How do you remove the Fuel Pressure Regulator on Chevrolet Trailblazer?
A: To remove the V6 fuel pressure regulator, start by relieving the fuel system pressure and disconnecting the cable from the negative battery terminal. Then, remove the air intake resonator and clean any dirt and debris from around the fuel pressure regulator. Disconnect the fuel pressure regulator vacuum line and unclip the engine wiring harness. For installation, start by installing a new O-ring and lubricating it with clean engine oil. The remainder of the installation is the reverse of the removal.