Rear brake caliper wont go in far enough

I have pushed the piston and twisted it for the e-brake and still, it will not go in far enough. I got it far enough that I could get it back together but it is draggin very heavily. The passenger side went fine, drivers side is the problem.

This is a full brake job, new rotors and new pads.

What am I doing wrong?

Thanks,
John

Go over to autozone.com. register your car(free) Go to repair guides, brakes, brake pads. Scroll down to rear brakes. Has a pretty good write up on the built-in e-brake pads replace. Did you pull your caliper guide pins? Clean them and the bore sleeve. May need some fine steel-wool or sandpaper.

Okay, we got it.

One of the slides was rusted and wouldn't move so the caliper wouldn't slide. I am ashamed that I didn't notice this earlier. Oh well, live and learn. could not move the slide at all, luckily Autozone was still open and had one bracket in stock. New bolt kit and bracket and it went together slick as snot.

Thanks,
John