Disc Brakes Dragging

I have a 91 Sonoma; the left front disc brakes are dragging. I replaced the caliper, pads and rotor. I had to replace the pads and rotor, smoked 'em. I can drive about 4 miles on the road at 55 mph and use the brakes at least as possible and the front left wheel will be so hot I can't hold my hand on it.
The break line supplies fluid to both front wheels. Could the culprit be the rubber flex hose?
Any ideas would be appreciated. Thanks

Yes, a bad brake hose can cause the hang-up. I've been in the habit of replacing the hoses any time I replace a caliper.

Hope this helps.

The hose was the problem. Thanks for the help.