OEM 2007 GMC Canyon Fuel Rail

2007 GMC Canyon Fuel Rail Parts and Q&A

• Q: How to replace the fuel rail assembly on 2007 GMC Canyon?

  A: A proper replacement of the Fuel Rail assembly necessitates the procedure to vent fuel system pressure first. Disconnect both the fuel feed line quick connect fitting from the Fuel Rail as well as the evap purge tube from the throttle body control module and evap canister purge solenoid valve . First disconnect the engine wiring harness from the Fuel Injector harness electrical connectors after removing the Intake Manifold. You should clean the Fuel Rail assembly as well as the Cylinder Head with gm x-30a spray engine cleaner or equivalent while making sure the Fuel Rail remains dry from liquid solvents. The procedure requires removing Fuel Rail bolts and extracting the assembly while supporting the rail and avoiding contact to terms and spray tips of the injector electrical connectors. The holes need to be plugged up along with the fittings to keep outside materials from entering. Extract and dispose of the lower o-ring seals attached to the feed injectors. When the existing Fuel Rail will remain in place employ the installation procedures. The Fuel Rail disassembly process starts with harness clip removal from the Fuel Rail followed by removing the Fuel Rail harness and then taking out Fuel Injector retainers and fuel injectors. Upper o-ring seals follow for removal from the injectors. Before installation of new upper o-ring seals with mineral oil gm p/n 9981704 users should lightly lubricate them. Then position the fuel injectors with retainers alongside the harness which should get secured with clips. You should apply a small amount of mineral oil gm p/n 9981704 to the new lower o-ring seals before placing them at the injector tip ends. Set the Fuel Rail in position to the Cylinder Head where the injector spray tips should slide inside and push it until it reaches full seating. Before reinstalling parts the technician must first install Fuel Rail bolts at 10 n.m (89 lb in) then connect engine wiring harness to Fuel Injector harness electrical connector and put back Intake Manifold and attach evap purge tube to throttle body control module and evap canister purge solenoid valve . For fuel feed line quick connect fitting installation connect it to the Fuel Rail before conducting leakage inspections by following the sequence of turning on ignition with the engine off for two seconds and off for 10 seconds and on again with engine off to check for any fuel leaks.