Give your 2007.5-2010 Chevy/GMC 6.6L LMM Duramax a big boost in electrical power with new batteries. The average life expectancy of a battery is typically between three to six years, but there are several factors that can have an impact on that estimate. Dual batteries were offered on some heavy-duty diesel trucks. If your truck has two batteries, it's always a good idea to replace them both at the same time. Shop XDP today and get a new battery for your vehicle. XDP carries leading battery manufacturers such as Odyssey, and more! There are various indicators that your truck's battery is deteriorating and needs to be changed. Sluggish engine cranking or dim or flickering headlights are often symptoms of a weak battery.