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battery drain
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  1. Electrical
    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...
  2. Duramax Seventh Generation: 2020+ (L5P)
    I have a 2020 Denali L5P. Seems that there isn't much of anything that can be left ON in the truck to drain the batteries - even if you turn the truck on and don't start it - it seems to shut off in 10 mins. However, this AM both the batteries are dead. (9.2 Volts left on them). I'll...
  3. Duramax Second Generation: 2004.5-2005 (LLY)
    I swapped in 2-145A alts, on my dual alt settup. The old 105's removed. I get 14.3V at idle with the battery light on, and DIC message "battery not charging". The light goes out over 1400 rpm. Surely 14.3 V is more than enough to kill that circuit? I assume it is a voltage measurement that...
1-3 of 3 Results