When compressing the caliper piston(s), make sure either the master cylinder cap is off or the bleeder screw is open...otherwise the fluid in the caliper will have no place to go except maybe where it shouldn't (i.e. out the seals, etc)
But I echo the previous comments....if one caliper is done, the other isn't far behind. Im on my 3rd set of calipers for my 01 with 75K miles. The biggest issue seems to be the bottom slider pins freezing up with in turn causes caliper issues if you let it go too long. So keep those pins lubed up, once maybe even twice a year. And it seems to be a lot of Nissan products, not just the Frontier. My 01 i30 needed new rear calipers at 60K miles.
But I echo the previous comments....if one caliper is done, the other isn't far behind. Im on my 3rd set of calipers for my 01 with 75K miles. The biggest issue seems to be the bottom slider pins freezing up with in turn causes caliper issues if you let it go too long. So keep those pins lubed up, once maybe even twice a year. And it seems to be a lot of Nissan products, not just the Frontier. My 01 i30 needed new rear calipers at 60K miles.