R12 It is not produced anymore. Have to covert to R134.
R134a.
The engine type will vary from truck sonoma to sonoma, some may have a 1.9L, 2.0L, 2.2L, or 2.5L I4, or 2.8L, 4.3L, 4.3L Vortec V6.
r-134a
r-12
It takes r134a refrigerant.
you can buy the right refrigerant over the counter at checker auto or auto zone, the correct refrigerant is 134a
R134a
what makes a 1992 gmc sonoma 5 speed tramission quit when it gets hot
R-12.
R134 is used in all cars after 1992 or so.
R-134A. DuPont was the originator of this refrigerant (not Freon) and they called it Suva 134A.
If it is the original refrigerant, it's R-12 (which is not longer available). If it was converted, it has R-134A. You can tell by the type of service port (the fitting for replacing the refrigerant). The service port for R-12 has threads, R 134A does not.