Getting the rear diff fill plug off?

The drain plug is magnetic.

Considering the OP has an 06, I would go the easy route. Buy a few extra bottles of gear oil, whatever is cheap. Fill the diff up, drive for a little bit, change it again, then maybe do it one more time. Most of the shards and shit will eventually come out on the drain plug.

 

It may be too late for this, but if you haven't done so already, back the truck up on to ramps. This will give you more clearance below for a longer breaker bar

 

This is one of the reasons you always remove the fill plug before the drain plug

 

I have another vehicle to drive I'm just trying to get this fixed and take care of it without taking it to the dealer

 

Impact wrench. Get a battery powered one. Boom. Done

 

it was a dumb Idea drilling a hole all the way through. I wasn't planning on drilling it all the way through just enough to tap a hex socket in the hole and get it out that way. But I went farther then I planned

 

I tried the chisel and hammer tap and that didn't work

 

Soak w/quality penetrant as suggested.

Tap w/ball peen as suggested.

6 point socket on the nut as suggested.

Lefty loosey.

Long breaker bar, pipe extension if needed to get more than 24".

Put the end of the handle in the cup of your floor jack.

Jack slowly, allow the weight of the truck to be your muscle, making sure the socket stays square to the nut as you lift.