how much r134 does a ford 500 take
it depends on the actual model Nissan pickup, but most vehicles made after 1994 take R134 refrigerant. The refrigerant type and amount is listed in the owner's manual.
1.53 lbs of R134
100.50
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.
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.
1.98 lbs r134 a
With the A/C running Full-Blast @ Lowest Temp., You adjust R134 gauge according to Ambient Temp., & then add required amount of R134 until the black dial falls into the center of the Red 'Ambient Temp Zone'. Let engine run for 20 to 40 minutes with A/C remaining on Full Blast.
R134
2 cans or about 40 lbs
1.5 LBS will refill it
R134 .... IS freon.