What's the 2015 ram 1500 dome light bulb size?

You are going to need to use A578 bulb for the dome light on a 2015 Dodge Ram 1500 truck. These bulbs will cost between $4 and $12. I would recommend going with the higher end ones that usually say something like "long life" on them because they will last for years without dying. Much better than the cheap ones. To change out the bulb on this light all You will need to do is use a pry tool on the passenger side of the light on order to get it to flip open. It will be on a hinge. Once You have it open You can now unscrew the old bulb and put a new one in.