'99 Blazer signal lights

I have a 1999 Chevy Blazer, 4.3, 4door, 4x4 with 106000 miles. My turn signal flasher unit continues to flash when my signals are not on. Sometimes coming on when I hit a bump in the road. I changed the flasher unit behind the glove box and it seemed to help for a while but now it is doing the same thing. I found out today that my 4way flashers do not work. Sometimes when I wiggle the switch on the column I can get my flasher unit to 'click' but no lights come on. My turn signals seem to work fine, most of the time the clicking does stop when I manually stop it, or the cancelling cam stops it. But I can still here it when I hit a bump and my emergency flashers still don't work.

I checked on recalls, it looks like the 2000 and early 2001 models were recalled for this issue.