BPDuramax

Like others said, the chain stores have instructions not to change out some batteries and this is one of them. I changed out both of mine on a 2015 Duramax last month in about 45 minutes. It is best to change both of them when 1 fails. The other may not be far behind. But GM Warranty will not change but the bad one, I prefer to do it right. The module is just a box with about 5 big eye terminals to have to move out of the way along with 2 fender braces over the top of each battery.