AC adapter

I can't remember if my car was ever switched to R134a or not. Is there a way to tell? I'd like to measure my AC pressure but I have not been able to fidn an adapter that fits on the low side for me, which seems strange.
http://www.amopower.com/buick.2.jpg
http://www.amopower.com/buick.4.jpg

What year is your car? The adapter in the pic is for 134a.

Agreed... Thats an R134a port..

For the C and H Bodies, 1994 on was R134a

1993 - but i have had many AC repairs over the years, some of which they tried to talk me into the conversion. My last repair was a new compressor 2 yrs ago and I can't recall if i "gave in" or not. Sounds like I did.

1993 was the last year for R12, so evidently you did "give in" and let someone do the conversion. You can purchase a 134a gage kit at any major auto parts store. BTW, the conversion was in your best interest. :)