Upgrade the electrical system in your 2020 Chevy/GMC 3.0L Duramax with new batteries. Shop the wide selection of batteries for your vehicle at XDP. XDP carries industry leading manufacturers such as Odyssey Battery, and more! Dual batteries were available on many diesel trucks. If your truck has two batteries, both should be replaced at the same time. 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. 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.