i have a 2006 silverado crew cab and my question is my rack and pinion is leakin

What is your question?

I have a 2006 silverado crew cab and my question is, my rack and pinion is leaking through the pinion lower retaining nut where the pinion lower bearing is and i only have 71000 Mil and change. is it something that has to go to the shop and even have to replace the whole rack and pinion ,or is it something i could fix. what do you think?