Duramax Fourth Generation: 2007.5-2010 (LMM)
I have original OEM 8542 CCA 730 in 2008 Duramax 61K miles on truck. How can I make sure when replacing both that I get the newest and freshest batteries instead of some that may have been sitting on a shelf for years? I have been told by a dealer to try and keep OEM as long as you can as they...