I need to know how hard is it to put seals in the power steering rack for a GMC Yukon 4 wheel drive 5.7 vortex?

I would love it if you had a diagram and i do understand that it is going to be a pretty big job but i am good with my hands so would love some great advice since i will be doing this by myself and the only help i have is my three year old son. Trying to save some money and help out a neighbor in these hard times.