Chevrolet B10S1 gearboxThe Chevrolet B10S1 gearbox is typically used in small to mid size Chevrolet utility vehicles and pickup trucks. It is most commonly found in models such as: Chevrolet C10 (classic light duty trucks) Certain model years with inline 6 cylinder or small V8 engines. Chevrolet LUV (Light Utility Vehicle) Early Isuzu built small pickups rebranded as Chevrolet. Chevrolet S 10 pickups Early generations using similar 4 speed or 5 speed manual gearboxes.