You would add R-134a to the low side port. It is on the larger diameter line coming out of the fire wall just before it enters into the accumulator. You can find a drawing of this on the link below. Just click on the "Find Your Car's Low Side Port" icon.
You can add freon on the low side service port that is located on the accumulator next to the firewall................
1994 Chevy lumina freon type
ive got the 97 3.1 and its rouhgly 30oz.
you dont only a certified repair shop can handle R12
R134A
remove air filter and you will see it It may actually be UNDER the air filter box, which will require removing the whole air box assembly. That's where it is on a 1999 Lumina.
The low pressure port is the same place that you add Freon to your air conditioning system. The low pressure port will have a blue top.
R-12
how to add coolant to 1991 lumina?
What is cylinder head torque specifications for 97 Chevy lumina 3.1 v6
yes it will fit
== ==