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  1. K

    2002 duramax dually HELP plzzz turns over but wont start

    I thought that too since both batteries are AC Delco (how do I determine if they are the factory originals), but I had the batteries tested and O'Reilly's said they should be good. They are just slightly down on volts and amps. Is that enough to cause the erratic gauge behavior and lack of...
  2. K

    2002 duramax dually HELP plzzz turns over but wont start

    I went to start my 2002 Chevy 6.6L last week and found it giving me the rat-a-tat-tat/buzz sound. Lights & gauges are all in working order. I saw sparks on the battery(s) when I disconnected them. Pulled the batteries and they are charged up with good numbers. Thought the starter could be...
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