For GM vehicles equipped with a 315 or 433 MHz Tire Pressure Monitoring (TPM) system, a \"Sensor Re-Learn Procedure\" must be performed after tire rotations, Remote Control Door Lock Receiver Module replacement or Tire Pressure Sensor replacement. This re-learn procedure can be performed by using special tool EL-50448.Also works on 2014 GM models The tire pressure sensor on models in & after 2012 can be read, only with some specified diagnostic tools. Before tire pressure monitoring system works