GM 12633513 Rail Assembly, Multiport Fuel Injection Fuel

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We shall remove the fuel injectors by first of all reducing the pressure within the system and cutting off the cable from the battery. Detach engine cover(s) and disconnect fuel supply line at fuel rail. On supercharged models, unscrew fasteners that keep manifold attached to the front of charge air cooler and unplug fuel injection electrical connectors, MAP, IAT, supercharger air output sensors connectors, PCV tube and ignition coil electrical connectors. For non-supercharged models, undo electrical connecters for each injector. Clear intake manifold or supercharger where injectors are inserted. Remove fuel rail fasteners as well as fuel rail assemblies. Take off each injector's electrical connector from a supercharged model. Stroke out injector retaining clips backwards so that injectors can be pulled out from a rail of fuels. Tear o-rings away from injectors. Spread clean engine oil on new O-rings then place them over every one of these components in question in those fuel delivery systems' wires. Now put each individual injector into its respective bore where it is mounted in a fuel track while securing with an injecting loop which prevents them against falling down or getting lost somewhere nearby this area after installation has been made which would lead to a fire accident because there were possibilities if any remaining combustible gas escaped through this small opening especially during transportation related activities involving other parts like gasoline tanks containing compressed natural gasses (CNG). Reattach cable back onto negative terminal of battery then switch ignition key to ON position thus activating pump before searching for places where leakage might have happened.

For V6 engines, removing the intake manifold and related components is necessary.