OEM 2006 GMC Envoy Fuel Rail

2006 GMC Envoy Fuel Rail Parts and Q&A

• Q: How to replace the fuel rail assembly on 2006 GMC Envoy?

  A: The first step to replace a Fuel Rail assembly requires the practitioner to relieve system pressure. Reverse the fuel feed pipe from its connection on the Fuel Rail before removing the Intake Manifold. Use gm x-30a engine cleaning spray or equivalent according to package directions for cleaning the Fuel Rail assembly together with the cylinder head. Soak the Fuel Rail in cleaning solvent. The in-line connector for the Fuel Injector harness needs to be separated from the engine wire harness before removing it from the rocker cover. Start by eliminating the bolts securing the Fuel Rail and proceed carefully with Fuel Rail removal before taking measures to protect the injector electrical connector terminals and spray tips. Fitting caps along with hole plugs should be used to stop contaminants from getting inside the system. Separate and get rid of the injector lower o-ring seals that are found on the spray tip ends of each unit. Continue with installation when the Fuel Rail remains unchanged. To disassemble the device start by removing the Fuel Injector wire harness from the Fuel Rail followed by extracting the fuel injectors from the Fuel Rail. The Fuel Rail requires the Fuel Injector harness installation followed by Fuel Injector placement to the rail. You should apply clean engine oil to new lower injector o-ring seals before placing them on the spray tip end of every injector during the installation process. Position the Fuel Rail assembly and apply threadlocker gm p/n 12345382 (Canadian P/N 10953489 or equivalent onto the Fuel Rail bolt threads before torquing them to 10 N.m (89 lb in). The positioned Fuel Injector harness in-line connector should attach to both the rocker cover and the engine wire harness while the fuel feed pipe meets its connection points to the Fuel Rail along with the injector electrical connectors. Install the Intake Manifold then reconnect the negative Battery Cable and search for leaks by turning on ignition while engine is off for 2 seconds followed by 10 seconds of off time and a final 2 seconds on time before end fuel leak inspection.