If you're not the original owner of the car, I'd recommend you have a refrigerant purity test performed at a shop. A 1990 would have used R-12 - however, many R-12 systems were later retrofitted to R-134a, and this cannot be determined by visual inspection - they usually retained the R-12 schrader valves, even after conversion to R-134a.
R134a
A 1990 Cadillac Deville air conditioner should hold 46 oz. R12 Freon. This should be verified through the owners vehicle manual.
Refrigerant is R134a
r134a
How do I put freon in a 2002 Cadillac deville
Was built for R12, can be converted to R134a.
One type of freon that you can use on a 1990 Ford Econoline is Four Seasons R12 Refrigerant Oil. The canisters cost close to $10 each.
There is only one type of freon, but before we go further, freon has been banned due to it's hazardousness to the environment.
Was built for R12, can be converted to R134a.
Was built for R12, can be converted to R134a.
It is 134-a. Good luck!
The 1990 Cadillac Sedan DeVille is front wheel drive. The 1990 Cadillac Sedan DeVille is front wheel drive. The 1990 Cadillac Sedan DeVille is front wheel drive.