[ssgharkness020147]

Batteries will go bad over time, especially with having a glow plug system. I believe the best battery for the HUMMER is the Optima yellow top. Optima reccomends the red top because of their high power output, however they can only be discharged a few times before they are ruined. The yellow can be discharged a couple hundred times before its toast. Did you install anything recently? I think you were talking about putting some lights on??? If you have installed anything recently I would reccomend doing a parasitic draw test on the circut and see if its pulling any type of draw.