Grapevines are also known as Vitis are a genus of roughly 60 or so species of vining plants.
They are important to the economy as they are the source of grapes with are both consumed as fruit and also fermented and turned into wine.
The cultivation and study of grapevines is called viticulture.
So can chinchillas eat grape vines at all?
No, they cannot eat grape vines at all.
It is just way too much for their stomach to handle that it would make them sick.
Therefore make sure you avoid feeding this to them as it is too sweet.