R12 unless it's been converted.
R134a
134a
R134a
R12
R12
R-134 Refrigrant.
R134a freon.............
R-12
134A 134A 134A
what type of engine do you have?? V6
were is the fuel regulator located on a 1988 chevrolet celebrity ? The fuel pressure regulator is located under the intake manifold on the 2.8 V-6 engine but the pressure (Schrader type) test valve port is on the front of the engine to the right and just below the oil filler cap.
It was built to use R12, but can be converted to R134a