It depends on the year, make and model because some will hold as little as 1.0 pound while others will hold 4 plus pounds............
The 1992 GMC Suburban came from the factory with R12 not R134. Unless it is has been converted to use R134 you cannot simply add R134. If it has been converted you need to have the leak fixed before adding anything. It is illegal to add refrigerant to any system without first repairing the leak. How much it will hold depends on how much leaked out.
Why would you want to even consider doing this? R12 is no longer in production and as such it cost almost 4 times as much as R134. But to answer your question, use R12 in a R134 system and you will destroy the compressor as the oil is not compatible with R134 oil.
American manufacturers today hold how much of the U.S. auto market
how much r134 does a ford 500 take
Enough to recharge the system after the leak is repaired and no more.
1.53 lbs of R134
how much auto trans oil in pugeout 306
100.50
FREON (R12) was banned beginning in 1996. Your vehicle contains R134, and as to how much. I suggest you seek a professional to repair the leak and recharge the system, as it is illegal to install refrigerant without repairing the leak.FREON (R12) was banned beginning in 1996. Your vehicle contains R134, and as to how much. I suggest you seek a professional to repair the leak and recharge the system, as it is illegal to install refrigerant without repairing the leak.
1.98 lbs r134 a
2 cans or about 40 lbs
1.5 LBS will refill it