running rough, misfiring

By rebel77
January 23, 2006 in Ask A GM Technician

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rebel77

Posted January 23, 2006

I am having trouble with a 03 silverado with 38,000 miles. 5.3 motor 4wd.

I am getting several codes, dont have them with me. The codes were for too lean a mixture and misfiring. Autozone said it showed the oxygen sensor. I changed that along with the fuel filter. I reset the computer. The SE light has come back on and the truck is mis firing and running the same. It does not do it all the time. Most of the time it is when I am stopped or coming to a stop. I am going to try the cap wires and plugs.

Any other suggestions?

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