Gear box

From the information available the Vita has been sold under a few names, The Buick Sail, Chevrolet Corsa. Holden Barina, Opel Vita/Corsa (Vita is Japan only name) and a Vauxhall Corsa.
However it was sold with a large variety of engines and gearboxes depending on the country it was intended for. You would need to verify which transmission you actually have in your vehicle to be sure which box replaces it.