Sorry to resurrect this thread... I am wondering if anyone else has had this issue since this thread had died. I just bought a 2000 Blazer and this clicking is killing me! Is the entire turn signal assembly or is there something else? I plan on going to a junkyard first but wanted to know if there is anything else I need. Thanks in advance!

 

After some research, I found out that just replacing the hazard switch can often solve the problem. I've bought the replacement switch but haven't gotten around to installing it yet. Hope to do so soon. When I do, I'll be posting the results. I think the switch cost about $18, so well worth the gamble.

 

Had the same issue.

Problem was a bad turn signal relay!