You have to change the whole rearend and the master cylinder.
YES
Single piston, if it has disc brakes on the rear axle... some GM models still used drums for that MY. Not sure if the Tahoe did or not.
Yes, it should be disc brakes.
Yes. There are manysuppliers of aftermarket bolt-on kits.
Disc brakes
be sure to purcahse the tool to "screw" the caliper piston in. If you try to push the piston in on rear disc brakes you will damange the caliper.
Yes, the front has discs brakes on them.
They are disc brakes and self adjusting
Power assisted disc brakes.
If yours has the rear disc then they all have them.
do you have 4 wheel disc !!! if so look on the backing plate of the rear axel it adjusts like drum brakes through a hole in the plate
To change the front disc brakes on a Kia Rio, simply remove the assembly held by two bolts. Push the piston back and replace the disc brakes with new.