Mine does the same thing. Someone replaced the bushings before I got the Blazer and left the spring out. I need to put it back and do the passenger side but I keep putting it off lol.

 

I ordered new hinge pins for all the doors and only ended up doing the driver door that was really bad. I will be ordering at roller tomorrow for sure.

 

I went out and looked at my door, I am missing the pin that the roller goes on

 

Have you checked your local salvage yards?

 

The local junk yard doesn't have any blazers on the lot.

 

One off an S10 should work for the front doors.

 

Here's a way to get around trying to put in a new pin.
I just used the bottom part of the shaft where the pin fits in, cut off and drilled out, around a bolt long enough to fit up through with a collection of washers to replace the roller.

Cost less than $10 and only took a half hour or so start to finish.

Here's a pic:

 

Heh, that's awesome. You should post that in the jury rig thread in General Chat

 

LOL, I ordered the two parts I needed for the door, forgot the damn spring though. I will order it after I know i have all the parts I need. Cost me $23.00 after shipping was added on.