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  1. P0300

    Chevy Silverado Forum (GMC Sierra)
    2008 Silverado 5.3 V8 with AFM with 180,000 miles Current issue is flashing check engine light with code p0300, snap-on scan tool reading missfires on cylinders 1, 2, 4, and 7 Before current issue the truck had slight lifter ticking sound and white smoke upon every start up which would go away...
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