The short answer
Cracks do not automatically rule out concrete lifting. The key question is whether the pieces are still strong enough to move predictably and remain useful afterward.
Hairline and moderate cracks may be workable
Large fragmented sections are harder to lift together
Lift can improve alignment without making cracks disappear
Crack sealing may be recommended after leveling
Common questions
Will lifting close a crack?
Sometimes the sides move closer, but the crack generally remains and should not be represented as “healed.”
When should cracked concrete be replaced?
Replacement becomes more attractive when the slab is badly deteriorated, spalled, structurally broken or cannot be lifted as a stable unit.
Use this information to compare quotes
Ask each contractor what material will be injected, how the original cause of settlement will be addressed, what is included in patching and cleanup, and what conditions are excluded from any warranty.