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  1. J

    2005 gmc c5500 6.6 lly 1093

    I have a 2005 GMC C5500 with LLY and keep getting P1093! Have change the fuel rail relief on the drivers side rail and same thing. Have done a return test on the injectors left bank less than 10cc and the right bank the same reading. Change the high pressure pump and drove it ten miles and the...
  2. J

    2005 gmc c5500 6.6 lly 1093

    I have a 2005 GMC C5500 with LLY and keep getting P1093! Have change the fuel rail relief on the drivers side rail and same thing. Have done a return test on the injectors left bank less than 10cc and the right bank the same reading. Change the high pressure pump and drove it ten miles and the...
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