:banghead: I have a leak in my a/c unit . Has anybody used a leak check kit . And do they work . My blazer is 1997 LT.

If you are asking about the dye and special light they do work.

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.

In my -98 there is a same problem. How do I diagnose if the leak is in compressor. I still have some pressure left in the system, would it be completely empty if ..? Or should I just take it to the shop to be refilled??

In my -98 there is a same problem. How do I diagnose if the leak is in compressor. I still have some pressure left in the system, would it be completely empty if ..? Or should I just take it to the shop to be refilled??

Better to start a new post with your problem.
But for leak checking they make a dye and light kit that works good.
But most of the time you will need to recharge it first and then check for leaks.
Many places they can leak.
Also a tell tail sign of a leak is ac oil seeping at the leak.