Window Help

My front driver window in my 1998 blazer has come off the door frame, I am trying to fix but my problem is that I can't get the rivets to come off. If any one has clue how to get them off please let me been working at it for 2 days now. Drilling has not worked and I am stuck please help.
Thank you

Did you punch out the center stud (or whatever it's called)

If you have and they still aren't drilling out their stainless steel, and will never come off with a normal drill bit.

I use chisles if possible for such jobs (which I thankfully rarely see)

Or you can try 1 of these drill bits
http://news.thomasnet.com/fullstory/25064/1106
I've never even seen then so I can't say if they'll work

Yeah no drill bits worked but got them out grinded them off and now I have a window again. Thanks for your help.

One more thing though a few weeks ago my heater core went out can any one tell me how hard it is replace on a blazer? Thanks

The heater core is time consuming to replace, but not difficult. If you do a search on this forum for "heater core", the replacement procedure will come up.