Help With My 99 Yukon

My 99 Yukon it first start shaking while in drive but stopped. Then it just started shaking while in park and while driving. I had a cell when i went to get a checked it was 2 O2 sensors and a 4 cyclinder misfire, so i got 2 O2 sensors and changed all spark plugs and wires. And that didnt fix the problem.
Anyone have any ideas?[/SIZE]