Over a year ago my truck started making a creaking noise that gets louder over time. I've had it in the shop 4 times now for multiple weeks and they keep replacing front end suspension components (control arms etc). It is silent for a few weeks then gradually returns. Even standing on the running board and rocking the truck back and forth makes a loud creaking sound coming from the front end of the truck. Any ideas ? Goes out of warranty in 6 months and am scared the dealer won't have it fixed and I'll be paying out of pocket.