06 equinox AWD ... Groaning noise coming from front (I think) . 72000 miles, and car needed tires anyway. It sounded like a tire noise to me and seemed worst at 40 - 50 MPH. New tires did not help. One guy told me front hub bearings...common on Equinox. Never looked at the car, said he knew what the problem was just by my description and having done several 'Nox's already. Any help out there is much appreciated. Considering doing it myself in the driveway. Difficult ? Special tools needed ?