GMC 12629927 Direct Fuel Injector Assembly

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It is important to observe specified stages when performing fuel system maintenance on different engine models. For example, before any work, relieve fuel system pressure and disconnect the negative battery terminal. The procedures depend on the kind of engine: you remove upper intake manifold when dealing with 3.2L V6 engine, disconnect electrical connectors from fuel injectors, detach vent hose, take off fuel rail support bolt and extract the fuel rail with injectors as a unit; similarly for 2.8L and 2004-2009 3.6L V6 engines you disconnect injector connectors, take out fuel rail mounting bolts and the like to remove fuel rail and injectors simultaneously; whereas for 3.0L and 2008-later 3.6L V6 engines you remove intake manifold, foam insulator, fuel pressure sensor, high-pressure fuel line and this off remove fuel rails and then injectors in sequence. In addition replace O-rings on these injectors Teflon seals should be done using special tools or an alternative method that does not employ any specific tooling. Finally reinstall injectors as well as fuel rail ensuring proper seating and tightening them secure enough.For 5.7L and 6.0L V8 engines clean around them or else disconnect wiring leading to it then remove bolts holding it there upon which one takes out O-rings for replacement before re-insertion.Likewise in case of six point two liter cubic capacity engine just cut the return flow inlet tube parts after removing covers over intake manifolds then unplug some linkages followed by disengaging bolts meant for such rails carefully get rid of damaged ones instead of their O-rings on them only during installation process backwards.Connect the negative battery terminal back making sure that you start its respective pump activating afterwards inspect lines' leaks from fuels in rails together with their other relevant parts.

If a special tool is not available, the Teflon seal can be installed by working it onto a socket and sliding it onto the injector.

The initial steps are to relieve the fuel system pressure and disconnect the cable from the negative battery terminal.

Insert each injector into its bore in the fuel rail and install the isolators with new seals on the injectors if equipped.

This is a single pack. If customer would like x6, they need to order that qty.