R-12 R134

[unit731]

Anyone know what year the US manufacturers switched from Freon to R-134? For OEM factory installed truck air conditioners.

 

Or was it gradual over a few years?

[MS3DALE]

GM switched over in 1994.

[NathanL]

I had a '95 GM vehicle that still had R-12. So not sure if it was some models or what. When the compressor went out I had it changed over to 134. It leaked for a while but I had a big stash of R-12 cans that I "aquired" a long time ago for a whopping 0.49 each as the price tag on it says.

[MS3DALE]

OK,Let me rephrase that...GM switched over the trucks in 1994 to R134. (My '93 K1500 had R12,My '94 K1500 & '94 S10 ZR2 had R134)

I think I remember that some cars,Mainly Geo's I think,still used R12.

I know my dad's '95 Lumina has R134 in it.

[Deichler]

I can actually chime in on this one. Where I work I had to take an A/C class to work on the machines we will be producing in '09 and Federal law says mandatory switch over for ALL Vehicle Manufacturers is 1995. I guess if yours was an early '95 it could have the old system of R-12, but all from '95 on MUST be R-134a. Just my .02 worth.

[NathanL]

Mine was an early '95 S-10. I know it was early because I bought it around October of '94. Friend bought a '95 later that year and his had the 134. His also had DRT's and mine didn't.