Stop being a Chevy guy for three seconds just plowing ahead and read up. Here it comes.
Remove the entire drum/hub assembly. Get a 5/8 metal cutting hole saw. Drill through the drum only around the broken stud. This will cut away the sewdged part of the stud and allow you to drive it right out and not ruin the hub. If you try to drive it out without cutting the swedge off, you will ruin the hub and drum both. If you get hung up and need some help, post up and we'll help you out. It's an easy job, but it's equally easy to booger it slam up if you don't do it correctly.