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2016 lml

  1. 11-16 LML Duramax Powertrain
    Hey guys, sorry to bother. I'm starting to scratch my head wondering where to begin the diagnostic process. So the truck acted like it had bad batteries, and would begin to crank for a few seconds, but then click. So, I tried checking batteries, and they said 12.3V @ both batteries. (Was using a...