This kind of goes along with another question I asked but after searching for awhile, I could not find the answer that I am almost certain others want to know also and many others probably have been through this.
There are a lot of people of who say that R134A conversions don't work well because the vehicles were not designed for them. But what if you are in the unique situation as we are where 1988-1993 owners where there way an identical version of your vehicle that was designed for R134A such as the case of 1994 GMT 400s.
Could it be as easy as ordering 1994 parts and putting them in an older truck to have a factory functioning AC system. I think R134A systems have an additional cut off pressure switch in the lines that R12s don't. How do you get around this. Do you also need a 1994 engine harness and computer or can you wire in the switch yourself?
There are a lot of people of who say that R134A conversions don't work well because the vehicles were not designed for them. But what if you are in the unique situation as we are where 1988-1993 owners where there way an identical version of your vehicle that was designed for R134A such as the case of 1994 GMT 400s.
Could it be as easy as ordering 1994 parts and putting them in an older truck to have a factory functioning AC system. I think R134A systems have an additional cut off pressure switch in the lines that R12s don't. How do you get around this. Do you also need a 1994 engine harness and computer or can you wire in the switch yourself?