TrailBlazer 4WD L6-4.2L (2007)
1. Install the fuel injector harness (2) to the fuel rail (1).
2. Install the fuel injectors (3) to the fuel rail.
Installation Procedure
1. Lubricate the new lower injector O-ring seals with clean engine oil.
2. Install the new O-ring seals on the spray tip end of each injector.
3. Install the fuel rail assembly (1).