Dragging caliper, HOT Options

[Goonter]

ok so for a few days now (2-3) ive been smeeling my brakes after a 20 minutes drive or so. i thought it was normal since i am using the brakes and all. but today i noticed that only one is getting hot. the front left side. after 20 minutes of driving i went outside. it smelled and felt hot.. i touched the caliper and it was HOT. i touched the front right side and it was cold. 9its winter here right now). i figured it was a dragging caliper. when i try to accelerate it feels like it's being held back and the acceleration is not smooth. does it just need a celiper replacement?.. or is this something more complicated?.. inputs are much appreciated thanks

[Con99vert]

So I decided to finally tackle this problem, but it is kicking my ass. It seems to me that my caliper piston is way too tight. My pads were wore down to metal so i decided to start by replacing the pads since i know that uneven wear can cause the brake to stick. So i installed new pads and pushed the piston back in with a C-clamp. I lubed up all of the slides, brackets, pins, bolts and put everything back together. The wheel spun freely and was nearly silent compared to the constant metal on metal scraping sound that it had before. As soon as I started the car and pressed the brake pedal, the wheel immediatley locked up and would not spin freely. This leads me to believe that my caliper is not releasing correctly. How much would it cost to either have the caliper rebuilt, or replaced? Is this my next step, or am I missing something much easier?