why would my power steering not work after replacing it with a new one

What is your question?

I have a 2006 Cadillac SRX i think the power steering went out i had it replaced with a new one by a mechanic but it still turns really hard (like a old tractor) i had the rack and pinion checked they thought it was ok..What else could it be? Thank you

What makes this problem better or worse?

Nothing

How long has your 2006 Cadillac SRX had this problem?

i think after i had them replace the timing chain