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2014 Chevy Silverado
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PO135 & PO155 problems

   
Old April 20th, 2011, 8:00 PM
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Default PO135 & PO155 problems
I have a 2004 chevy that came with a 5.3 and upgraded to the 6.0 and a couple days ago it started acting sluggish and misfiring and the po135 po155 codes are the only thing poping off and I just changed my pass side 02 sensor but the code is still throwing but I also have headers and no cats any ideas?
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