Brake light issues

[Kasey 1977 K10]

I have a 77 Chevy K10 Stepside. My drivers side brake light keeps going out. I have to replace the bulb every few months. I replaced it with an LED bulb last time hoping it would last longer. The assembly is only a couple years old from LMC. I'm wondering if there is a short somewhere or a faulty assembly from LMC. Anybody else had an issue like this?

 

[73c20jim]

Check grounds.

 

[Arkansas_V8]

Like @73c20jim said. Even if it looks fine. Quick hit with sand paper, or a wire wheel.

 

[Colin]

Does the bulb fit tight in the socket?
One of my brake lights would occasionally stop working due to negligible sloppy fit.

 

[73c20jim]

It's possible to force the bulb in backwards.

Please don't ask me how I know.