Take of rotors

[MasterJ220]

I have a 1998 GMC 2500. Everything runs fine but one day i noticed a grinding coming from the front right brake. I took the tire and caliper off to find that the inside brake pad had worn down to bare metal (I don't know how this could have happened since i checked the pads two months ago and they were fine). i bought a new rotor and pads, but i can't figure out for the life of my how to get the rotor off. i tried a puller but it just pushes the axle back. i'm pretty stuck. if anyone could let me know i'd really appreciate it. thanks

[dapolice1]

It is possible if it got hot enough that it "welded" itself to the spindle or axle)depending wether it is a 4x4 or 2wd