How is this removed? I just got a new cast aluminum oil pan from Vital49 and don't want to ruin the sensor. Large hex on the end, does it just unscrew, or what?

Yes, it just unscrews.
If you are replacing it, get an ac delco. The one from Azone didn't evenlast me a year.

LOL - I wasn't going to embarass him, but that is the only sensor that would be in the pan.

Of course I meant the "low oil sensor," without the "pressure" included.

Yeesh.

I think it would probably fit. I hope it fits my '99. I sent a PM to vital asking what car it came off of because it has a grooved gasket surface instead of a flat one. First one like that I've ever seen on an American ca.

Hex head looks like 1" or so. I'll post a pic later.

I replied to your PM. That pan came off a 1998 Intrigue L36. Let me see if I can find a pic.....

Here'* the pic from the For Sale thread:

Experience here

Most likely you removed the connector, started to remove the sensor and said "WTF, it won't come out because the starter/frame is in the way.

There are two ways around this.
A. Loosen sensor and leave sitting in pan, drop pan..sensor and pan will come right off. If sensor is not loosened..pan does not want to come off.
B. Loosen sensor, jack motor up until sensor will clear between frame and starter.