1999 Cadillac Catera Q&A
1999 Cadillac Catera Question: Which valve do I add freon to upper or lower?
Need to add freon . There are two ports, one on top nearer passenger Compartment and one lower nearer to radiator. Which do I use. - Visitor
I would not add any refrigerant if you are not familiar with a/c systems, take to a shop with the correct special equipment to do the job correctly, you can't just FIX a/c by JUST adding refrigerant. - raiderron