[DkMdville]

I just bought a 97 Deville With 80k Miles For 8,000
I notice when I turn the key you can hear a pump of some sort and you can hear an air leak coming from beside the right back tire, It stays on the whole time im driving and even when I just turn the key over without starting the car. The car still has a very smooth ride but Im concerned with the pump going out since it is working so hard I am pretty sure its a airbag leak or a hose leak of some sort but im not real sure and I have to drive about 30 miles to the nearest place to get it fixed. If somone could tell me what it might be, If its ok to drive it very much and how much It would cost to fix would be greatly appreciated. Thanks!