You will add the R-134a thru your low side port. You will need a gauge to check the PSI level when filling. (You do not need the Manifold gauge set). There are a lot of all in one products you can purchase that have the R-134a and oil included in them. Some will even come with a reusable gauge.
R134a
R134a
R134a
R134a
1994
is it factory or an add on?
R134a
R134a
r134a
R134a
A 1998 Buick would have been built with R134a.
R134a