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Something wrong with AC system...

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I tried to recharge the AC system by using adapter and added R-134a refrigerant...it took about one and half cans of refrigerant and it started blowing cold but than suddenly engine cut off

now whenever I connect that electrical connector to compressor engine cuts off ....so I was told to change compressor...correct me if I have wrong info..

if not any instruction guide to change AC in my 1989 GMC S15

What type of oil and how much oil I should add along with refrigerant?

also how much refrigerant should be added? I mean what is capacity?

Also, any diagram showing low port in this model?

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