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  1. A

    Problems after dead batteries and jump start

    You can't fix stupid. It was my own fault all along. The cause of the parasitic drain was the BlueStar module I installed as a plug-n-play replacement for OnStar months ago. I unplugged it when I found the batteries were dead. My thought was that it was only OnStar/Bluetooth. But in...
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    Problems after dead batteries and jump start

    The source of the parasitic drain was located and eliminated. The battery type are the OEM H6 series and are both brand new since the dead / jump. I have not yet started to locate and check grounds. However, seeing as this started immediately after the dead batteries and did not exist before...
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    Problems after dead batteries and jump start

    Is there any reference to where all the ground points are? I have looked through everything on AllDataDiy and can't seem to find anything
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    Problems after dead batteries and jump start

    I have a 2008 Silverado 2500HD Crew Cab (LMM) with ~145k miles. Truck is all stock with 2 batteries and 2 alternators and I’ve had zero issues prior to this. I had a parasitic drain on the batteries that would periodically draw the batteries down, but never low enough to affect starting. The...
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