2003 silverado with misfire

Discussion in 'Chevy Truck Forum' started by motormouth27, Mar 7, 2011.

  1. motormouth27

    motormouth27 Full Member

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    I posted the other day. Its 6.0 and it also has a flashing engine light. I check the coil packs plugs and wires all good. I added fuel treatment and no better. I was wondering if it is something wth the egr valve or something like that? could someone please help thanks.
     

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