i posted another post asking about oring and gaskets however i have another question. I have a 1999 chevy silverado 5.3l 4x4 with all new ac parts i installed everything correctly, vacuumed my lines for about an hour, added the correct amount of 134a using gauges. however when i turn my ac on it wor...

ok so i purchased a 99 chevy silverado 1500 5.3l with no ac components, I bought everything new as in compressor, evaporator, condenser, orfice tube, new lines, accumulator, pretty much everything. my question is how do i know where to use an oring and when to use the metal gaskets when installing t...