Thanks. I don’t know what it had in it originally. It’s R134 now. There are no stickers on the compressor. How would I be able to tell if it has been converted or if it came with 134?What type of compressor do you have? If it’s a 90 suburban I believe it would have had the old Frigidaire A6 style. And would have been on R12 originally. I can tell you from experience that converting those old compressors to R134 doesn’t work out that well.