Repairing or replacing a concrete parking lot
If the slab is still mostly flat and the cracks sit along joints or in a few spots, replacing those sections usually makes more sense than tearing out the whole lot. When it's sinking, rocking under trucks or holding water across wide areas, the base has usually failed, and new concrete on the same base settles the same way, so I'd rebuild the base and replace it. If the building beside the lot has settled too, foundation raising is a separate job we can look at.

