How to you take out the blinker lenes on an 01' blazer?? I know clips hold them in but how to you get behind the lens to push in the clips??

 

Well the actual lens itself comes out with the whole assembly. It's held in with clips as you mentioned. You need to remove the headlight first so you can see below at the clip holding in the turn signals.
There are 2 plastic tabs (see below) holding in the headlight assembly on the backside of the headlights. Just pull up on them and your headlight should come right out. Once you have the headlight out you should see the main tab holding in the turn signal. Squeeze that together and your turn signal should snap right out. Sorry, I only have pics of the top of the headlight assembly and not what it looks like with the headlight out.