You'll need a pressure gauge and know how to use it. The gauge will tell you when you have the right amount in.
Should be a sticker under the hood with that info.
How much freon does it take for a 2000 Chevy full size truck
2 cans of freon at your local walmart .
1500 to 2000
1.98 lbs r134 a
About 2000 to 3000 watts
3.5 quarts with 3.3 v6.
29 ounces
24x3
you dont put oil in the transmission, loser!
There should be a sticker located under the hood that tells you how much refrigerant and oil the system takes.
It should say somewhere on the tag.