Quote:
Originally Posted by 87chevy.com
I wired the a/c up without that switch... only things i have in the circuit is the low psi switch and the compressor clutch, and a/c relay... operates like it should from facotry with the ecm controlling the a/c relay.
clint
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That's how I did mine as well. I used the stock 5.3L compressor with the Old Air system and it looks and works great. Old Air is nice because you can buy a kit that doesn't include the compressor, condenser, or hoses and save some $$$.