Dont know if it helps.. what I did when I did my steering components last year. I bought all new parts from rock auto. All ac delco. Replaced everything pump, hoses, gearbox, and added a cooler. Took my time put all things together, then I jacked up the truck, put In some power steering fluid and turned lock to lock without truck running. Did it for a few minutes.. checked level and then started her up.. added some more fluid and turned lock to lock. Once she was topped off lowered the truck down and took it for a spin. I've had power steering issues good amount of time of owning this truck. So I wanted all things new. Knock on wood been working great and soon ima change the fluid. Just what i did for mine.
