2006 Denali brake light issues

[FergL]

Hey all,

Noticed the last few times that when ii get out of the truck that one reverse light is on. Now normally, you just replace the bulb. But the next time I went out, got to my destination, get out of the truck and the other reverse light is out. But the previously malfunctioning light is working. Where do I start to track down this ghost in the machine?

 

[Rocket Man]

Try cleaning the contacts where the bulbs go in the sockets and add dialectic grease to keep them from corroding.