Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!

possible parasitic drain

  1. 06-07 LBZ & LLY Duramax Powertrain
    Current issue is my 03 Sierra sounds like its cranking strong but will never fire up. I had both batteries tested at the local parts stores and they tested good. I figured since the batteries tested good and wouldn't hold a charge it may be the alternator. It looked easy enough to get off so I...
Top