A 2000 Chevy Silverado's rear differential capacity depends on the axle ratio and whether it's a regular cab, extended cab, or crew cab. There's no single answer.
You need to check your owner's manual or look at a sticker on the differential itself. The sticker, if present, will usually state the capacity.
Without that information, any answer I give you could be incorrect and potentially lead to underfilling or overfilling your differential, causing damage.
