Best way to lift k2500 suburban

Basic set is set the psi and leave it, usually a schrader valve installed on the bumper or some place accessible with an air hose if you want to add air. You can add an onboard compressor and in-cab control with gauge so you can see what psi you are running and add/remove air on the fly.

Airlift and Firestone are the two brands, look up your truck and see what they have available.