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P0304 GMC -

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how do I change the injectors... I know how to take it apart but the one thing on the side that is over the injectors..

Vehicle: 2003 gmc envoy 4.2 liter 4 wheel drive

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P0304 Misfire number 4 cylinder

P0300 Random misfire

To acces the fuel injector you reomve the intake manifold,then you reove the fuel rail assembly,

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