Vehicle Safety Manufacturing (VSM) is a leading producer of heavy-duty turn signal switches, lighting, and safety systems for trucks, trailers, and fleet vehicles. Founded in 1979, VSM serves both OEM and aftermarket markets with products that meet or exceed DOT and SAE standards. Known for precision engineering and long-lasting performance, VSM offers a wide range of components including relays, flashers, harnesses, and warning lights. See below for our current inventory of VSM turn signal switches and electrical safety products.