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 using the EL-50448 tool. Compatible with select 2014 GM models. EL-50448 Tire Pressure Monitor Sensor TPMS Activation Tool OEC-T5 On model years 2012 and newer, tire pressure sensors can only be read using specified diagnostic tools. Before the tire pressure monitoring system operates correctly, the body control module must record the ID information of each tire pressure sensor position. Use the following method to register new sensors after replacing a tire or wheel speed sensor: EL-50448 Instructions: The EL-50448 tool is compatible with General Motors vehicles (Buick, Cadillac, Chevrolet, GMC) manufactured for the North American market. It requires equipment frequency sensors (315 MHz or 433 MHz). Designed for use with GM vehicles equipped with a 315 or 433 MHz TPM system. EL-50448 Specifications: Item Height: 10 inch Item Width: 15 inch Item Length: 20 inch Item Weight: 0.3kg Hardware Version: OEC-T5 Software Version: EL-50448 External Testing Certification: CE Material Type: High quality plastic and metal How to Use the EL-50448 TPMS Activation Tool: Step 1 – Enter Learning Mode - Set the gearshift lever to "P" - Turn the ignition switch to ON - Access the tire pressure display through the DIC - When DIC displays "Press Set/Ctrl to re-learn", press the Set/Ctrl button - The turn signal will illuminate for 3 seconds and the horn will beep twice to confirm entry into learning mode Step 2 – Read Tire Pressure Sensor Information - Begin with the front-left wheel - Position the EL-50448 tool antenna against the valve core area, close to the tire sidewall rim - Activate the tool using the start switch - A single horn beep indicates successful reading of the sensor data Step 3 – Repeat for Remaining Wheels - Follow the same process for the front-right, rear-right, and rear-left wheels - Once all sensors are registered, the turn signals will illuminate for 3 seconds and the horn will beep twice to confirm completion This tool supports the Sensor Re-Learn Procedure for GM vehicles equipped with a 315 or 433 MHz TPM system after tire rotation, sensor replacement, or module replacement.