What is this plug for? I’m currently in the process of installing a camper in the back of my 03 D2, and need a place to run a hose for the drain on my sink. This looks to be a good spot if the plug just leads to the outside, but I can’t get it off for some reason and I don’t want to break anything if it doesn’t vent outside. It’s in the left rear of the truck. Thanks.
Appears to be drivers side (North American) outer edge rear corner of floor???
If so it’s likely a filler plug for a NON rear A/C truck
If that’s the case you are likely Okay for a drain.
Should be nothing else below
I wasn’t able to pull the plug (it seems to be glued in place or something), and looking under the truck, Rev was spot on about something being mounted there. I took a closer look at the area, and there is a smaller plug right behind the wheel well in the same area that goes right through to the outside, so I’ll be using that for my drain point. Thanks everyone for the input.