I have a 2001 LS 2WD. Issue I'm having is when I have the AC Compressor High pressure switch and the MAF connected the engine stalls out almost immediately after cranking. Disconnect either and it runs just fine. Any thoughts?

 

Need to run some OBD II codes for us. Lots of auto parts stores will run the codes for you, if you don't want to buy a code reader.
Have you had your A/C pressures checked?

Also you might want to clean the MAF, but.sometimes they go bad without throwing a code, IME..