OK not my elky but my 99 Tahoe. I thought maybe one of you have a similar setup if you've converted to a serpentine system.

Anyway the High Side valve core is leaking. I know the low side screws in like a tire schraeder valve. The high side is mounted in a what looks like a nut threaded into the block on the hoses at the compresser. I tried to remove it with a flare wrench but it doesn't want to move. I figured before I destroy something, I should ask.
How do you replace it?
Thanks

Try asking on this forum: http://www.autoacforum.com They will know for sure how to get the schrader valve out.

Thanks!:nanawrench:
I didn't even have to ask. Did a search and found a thread about the same problem on a 99 Suburban.
:beer: