What's the 2008 dodge ram reverse light bulb size?

The reverse light bulb on a 2008 DodgeRam is a size 921 bulb. This is a very common type of bulb and You should be able to find it at most auto parts stores around the country. When Your reverse light is not working the first thing that You should check are the fuses to it. If those are okay then the next thing to inspect is the wiring at the bulb itself to make sure that it is not loose or frayed. If that is alright then go ahead and replace the bulb and that should solve the problem. If You replace the bulb and it still will not turn on then that usually means that You have a bad reverse switch and the vehicle does not realize it is going into reverse.