right rear passenger door...

[dewey527]

sometimes the light comes on and sometimes not any ideas?

[TahoeA4]

Are you talking about the puddle light, under the door that shines on the ground? If so, take a screwdriver with tape wrapped around it and pop the light out and check that the bulb is in there securely. You might have to bend the metal holder a little bit so it makes solid contact with the metal parts on the lightbulb. You might want to pull the fuse first so you don't short out anything, I think it is fuse #23.