[muddog321]

If thats a 97 with original air you are very lucky. All the compressors blow the front seal at some point usually within 5 years and never get a rebuilt only a new one - cost diff not much and the rebuilts will blow in 1-2 years!
70-80K is the max any of mine two 98 and one 99 ever went on originals but the 01 is at 95k so have $800 ready for that this summer.