Originally Posted by cajun1955gmc
Sorry I forget to mention take the handle off first. That bolt holds it on. Once handle is off then the bezel will come off. There is a cylinder under it. That's were your two red lines point two. The cylinder has the set screws. Mine has two set screws.
I hope that helps.
You're right. The bezel was on really tight, but managed to pry it off, which exposed the two set screws which released the part that slips over the splined shaft. This one threw me because I've used the GM door tool before to slip behind the bezel on other cars and push out the spring clip to release the handle, but this one wouldn't allow any room to push the door panel away from the handle bezel to slip the tool in. Now I can get inside the door to see why the outer handle doesn't open the door. I'm thinking that the return spring is either broken or has fallen off, I'll soon see. Thanks again, guys!