Set of 4 new TPMS tire pressure monitoring sensors, GM part 13540603, 433MHz, rubber snap-in valve stem. Direct fit for many GM models: Buick Enclave, LaCrosse; Cadillac CT6, XT4, XT5, XT6; Chevrolet Blazer, Impala, Malibu, Volt; GMC Acadia, Sierra; also fits other 433MHz GM vehicles (Silverado, Tahoe, Suburban, Traverse, Camaro, Cruze, etc.). IMPORTANT: please confirm your vehicle uses 433MHz sensors before ordering - some model years use 315MHz instead. New, sold as a set of 4. Buyer pays shipping. Local pickup in Monterey Park, CA 91754.