I have a 2003 Chevy silverado hd, with power locks and windows?

[Kardashian]

I'm changing the side bulbs in it, and found there is this plastic molding behind the door panels, should I remove it? what is it there for?, and the plastic its like not all straight

 

[Johnny]

What do you mean side bulbs? Side marker lights? Or like by the headlights, like the blinker?

 

[CV9516]

Straighten it out and leave it there. It's to keep moisture out. Don't the bulbs in the mirrors change from the outside?

 

[TRANCER]

If your talking about the sheet of thin clear plastic on the door. the stuff you will see once the door panel is removed....
It's basically a moisture barrier as well as a sound barrier. Helps protect electrical wiring and power window motors, etc from getting wet. It does serve a purpose. I would keep it intact if possible.

 

[FishingBro]

Yes it serves a good purpose so leave it there for sure.