I just changed the rotors and bearings on the front discs of my 99 2-
wheel drive F150.

The question I have is that one of the caliper mounting holes (the
ones that slide/and are somewhat springy) seems to be seized. Since I
put the wheels back on, the one wheel is very difficult to turn by
hand. The truck drives fine. It does pull slightly to the side with
the problemed caliper mount.

Do you think the non-springy caliper mount could cause a wheel to be
difficult to turn? Are both caliper mounts supposed to be springy?
That side has been eating up pads 3 to one over the other side. It
also has a new caliper.

Can it be unseized? If not, what do I call the part when I ask the
people at the auto parts store?

Thank you in advance for your help.