I left the trunk open on my 2005 Pontiac g6 will it drain the battery over night or will the light turn off after a certain period of time?

Other answer:

Thea:
No, it will NOT turn the light off. If you leave the trunk lid open, the light will stay on and drain your battery. If you MUST leave the trunk lid open, remove the light bulb.
Poppy:
That light will remain on until the trunk is closed.
g:
The light will indeed remain on and potentially drain your battery.
Humveetech:
Usually the light stays on all the time til deck lid is shut
Dustin:
Possibly overnight but probably not. A longer period will definitely drain it.
Ella:
Hgfg
John Alden:
It could if your battery is weak, but most likely not.