i should be in bed !:shocked: take the door panel off. unclip the rod attatched to the handle mechanism. there is a small hex nut on the inside of the door that hold the front of the handle on. there is a screw on the door jamb that holds the rear of the door handle on. good night !!!
I recommend looking close at the mechanism. It may just be a little oil (real oil not WD40) in a couple places will have it working slick.
Repo outside door handles are notorious for needing rework out of the box. Many times you get nice shiney new chrome and bad function. At that point you'll need to figure out how they work. Aslo there are many points in the latch/lock mechanism that should be lubed while you have the interior panel off.