How do you tell if the rack & pinion need to be replaced? on 2004 Chevrolet Cavalier

Took my car to local mechanic as it was low on power steering fluid, about every week he would have to add fluid; now he is telling me it might be the rack & pinion but he doesn't know for sure.

Asked by for the 2004 Chevrolet Cavalier
check the rack for leaks - if you need to add fluid every week you either have a bad hose - pump - or rack. look for the leak and you will find your problem.