Mines are empty as well' even though it costed me $400 for a full service which only needed a regas back in Oct & now AC light not turning on ??
Refrigerant leak I am guessing.
The Low-Pressure switch has been activated.
Check the High-Pressure Pipe between the Condenser, and the Compressor, left side behind the left radiator fan.
(Attached is a pipe for a V8, but that do leak in the exact same location,)
Find the hose and fittings in the image and check it out with an Ultraviolet light if you can get hold of one.,
As the VE's have fluorescent dye in the refrigerant oil/gas.