Power steering failure. Replaced pump, rack and pinion, high pressure lines and bled system. Vehicle steers hard after replacing the aforementioned. What else to be done or replaced?
You don’t say your mileage. Are any of the actual mechanical steering/suspension components binding up?
There is a problem with the variable assist control. Check the wiring to the control valve on the rack and pinion for damage.
The variable assist steering is controlled by the air suspension module, check this module for fault codes.
Stock tires, rims and suspension . . . ?!