seized brake caliper on LF

I have a 95 blazer 4wd with ABS brakes and disks in the front.
Well I noticed my LF caliper was acting funny.
I was no longer able to compress the piston when I was putting in new pads. So I bought a new caliper. Bleed the 4 wheels.

I did notice upon bleeding the last wheel, the actual LF caliper I just installed, that the pedal did not go all the way down like the other wheels dead when I loosened the bleeding screw. (I had someone pump the brake and hold it while I opened the bleeders)

But I started the car, pumped it, loosened the bleeder screw on the LF, a shot came out, and I figured, OK, its bled. Its OK now.

Well I made sure I had brake fluid taped off, took it for a ride and notice it pulling to the drivers side a bit bring it home jack up the LF wheel and sure enough it is locked up and I even smell some burning.

Can it be my newly purchased brake caliper can be faulty?

Did I forget to do something?

Your suggestions are welcome!

The brake hose may have collapsed internally. If you can't push the piston in.. loosen the bleeder screw..if it goes in then the hose should be suspect.

Hey..I ahd the EXACT same problem, only mine was on both front calipers...I took them back off and greased averthing greaseable (is that a word?? ne way) i focused on the two pins and the holes pass though...and that fixed mine but....i was informed to check to see if the pistons had rust, if so they may need to be cleaned with a wire brush...um...I posted this question on other forums too so when i find those replies i'll post a link...hope i could help.