About to replace by Rear calipers on my 2010, do I need to disable ABS?

It's as easy as disconnecting 12v battery because the brake booster pump runs even when the car is turned off. But more importantly why do you think your "calipers are starting to go?" They aren't exactly a wear and tear part? Is it perhaps because they're making creaking sounds? Because I had that problem and when I replaced my original brake pads at 287K miles I simply greased the pins the calipers move on and problem solved, no need to do anything else.

 

Agree with @PriusCamper. Unless the calipers are fully rusted and disintegrating because you live in extreme climate, you should not need to replace them. Replace the pads, and lube the pins. Use silicone based lubricant only, on the pins, such as the NAPA Sil-Glyde (https://www.napaonline.com/en/p/BK_7651351?srsltid=AfmBOopHcuknQ1YHOHlm3P9UfWQzlJQDDWASPQO_BqubbyFyPFnVDtTJ)

Edit: Of course, you might find that the rubber boots on the calipers are worn/leaking. At that point it's a tossup between rebuilding the caliper vs buying a new one. Nine out of ten times, I replace the caliper when this happens.

 

That could happen on the REAR calipers. But it's NOT the abs.
If you open the drivers door, the brakes will pump up the fluid and push the pucks out.

Just don't open the door while working on the rear brakes.

Unless the pistons/pucks, are frozen, there is NO reason to replace them.