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Old 05-23-2016, 12:47 PM   #1
1970greenc10
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Join Date: Oct 2008
Location: Forestville, NY
Posts: 225
engine codes

Hi, my 03 Silverado 2wd with a 5.3 is throwing codes, U1002,P0725,P3531, and P0455 which I know is a large evap leak. Can anyone tell me what the first 3 codes are for. I tried googling them, but couldn't find anything.

Thanks, Marty
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