R134a.
R134a
R12 It is not produced anymore. Have to covert to R134.
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.
R134
134a
R-134a
r134
R134A
R134....But to be sure, lift the hood and there should be a sticker telling you what type of refrigerant to use.
r-134a
134A
The refrigerant is R134a.
R134a