2009 Chevrolet Trailblazer Fuel Injector

First, you need to remove the fuel rail assembly and disconnect the fuel injector electrical harness connectors from the fuel injectors. Then, please remove the fuel injector retainer clips, remove the fuel injectors from the fuel rail, and discard the injector retainer clips. Finally, you should remove the injector O-ring seals from both ends of the injectors and discard the O-ring seals.

First, you need to lubricate the new injector O-ring seals with clean engine oil, install the new injector O-ring seals on the fuel injector and install a new retainer clip on the injector. Then, please push the fuel injectors into the fuel rail injector socket with the electrical connector facing outward. Finally, you should connect the fuel injector electrical harness connectors to the fuel injectors and install the fuel rail assembly.