of the a/c? I thought the 1999 had an R134a system, but I can't find the quick connect valve that would be associated with that system, The green capped valve I found (near the fire wall on the driver's side)was labled as a Evaporator Service Port and resembles a tire valve stem which seems to suggest R22 instead of R134a. There is another port on the driver's side about midway down the fender that is capped in black with no label. I can't seem to find a label anywhere which states if the system is R22 or R134a, and what the capacity of the system is. Can anyone help?
I have a 1999 Pontiac Grand Prix with the 3.1L V6. Is the green cap the low side
- Thread starter Mason
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