#1 cylinder mis firing

2005 GMC ENVOY
102,000 MILES
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ERNIE113
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05 GMC Envoy 5.3L, P0301 code #1 cyl misfiring, 102,000 miles plugs replaced at 80,000miles, i have replaced coil and wires, still running rough at low rpms, any ideas?
Nov 12, 2011 at 9:54 PM
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