I have been loosing air (about 11 #'s every 4 days) from my rear tire. I thought the valve stem was bad so I took it to a tire shop to get the stem replaced. I was told that the rim is all corroded around where the valve sealed and that eventually I would need a new rim. The car is never in harsh weather and its fairly new. Anyone else here have a similar problem and did pontiac step up and replace it?

thanks in advance

sincerely

pj