EL50448 TPMS Activation Reset Trigger Tool For GM Vehicles

A **TPMS relearn** (Tire Pressure Monitoring System relearn) is the process of teaching a vehicle's TPMS system to recognize the new positions or IDs of the tire pressure sensors. This is necessary when:

* Tires or wheels are rotated.
* A sensor is replaced.
* New wheels/tires with different sensors are installed.
* The system is reset after a repair or battery disconnect.

Purpose:

To ensure the vehicle knows which sensor is in which position (e.g., front-left, rear-right) so it can accurately report tire pressures.

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Types of TPMS Relearn Procedures:

1. **Auto Relearn:**

* The vehicle learns the sensor locations automatically after a short drive (usually 10–20 minutes).
* Common in many modern vehicles.
* No tools required, just follow specific driving conditions.

2. **Manual Relearn:**

* Requires user input via the vehicle’s menu system or dashboard controls.
* The vehicle enters “learn mode,” and the sensors are triggered in a specific sequence (usually starting at the driver’s front wheel).
* May need a TPMS scan tool or a magnet/trigger tool.

3. **OBD Relearn:**

* Requires a TPMS scan tool that communicates directly with the vehicle’s ECU via the OBD-II port.
* Sensor IDs are read with the scan tool and then uploaded to the ECU.
* Common for vehicles that don't support manual or auto relearn.

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General Steps (Manual Example):

1. Set all tires to the correct pressure.
2. Put the car in relearn mode (via ignition key cycles or menu selection).
3. Start at the driver's front wheel.
4. Use a TPMS tool to trigger the sensor (you’ll usually hear a honk or beep).
5. Move to the next tire in a clockwise pattern.
6. Exit relearn mode once complete (confirmation tone or display message).

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Tools You Might Need:

* TPMS Relearn or trigger tool.
* OBD-II TPMS programmer (for OBD relearn).
* Tire pressure gauge.
* Repair manual or scan tool instructions for your specific vehicle.

If you tell us the year, make, and model of your vehicle, We can give you the exact relearn procedure.