A/C PROBLEM

we have a 98 tahoe up here at the shop and its not blowing cold. we charged it, check the acuator, clutch is engaging and full power every where. it was blowing hot till we put a new dryer in it then it started blowing cool but not cold. if anyone knows anything holla back

The same problem is reoccurring to my cousin\\'s \\'09 chevy tahoe. As i\\'ve checked on car problems,my problem could be the a/c compressor since notice leaks from it but I also notice some damages on its hoses. Does anyone have an idea on how much I\\'d spend for repair?