Upgrade the starting power in your 2017-2019 Chevy/GMC 6.6L L5P Duramax with a new battery. Shop the wide selection of batteries for your vehicle at XDP. XDP carries industry leading manufacturers such as Odyssey Battery, and more! 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. There are several signs to indicate the battery in your truck is failing and needs to be replaced. Sluggish engine cranking or headlights that are dim or flickering are telltale signs of trouble. 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.