98 Malibu 3.1L

Does anyone know the freon capacity for this particular vehicle. This ones been in a wreck so the sticker with the info is gone.

Has all the 134a leaked out. ? Have you exposed the system to air ?
if so you my have to have the system evacuated to remove all moisture and air. And the right type of lube and r134a. Aprox 2-3 lb cans