Descriptions: Most of For G.-M vehicles equipped with a 315 or 433 MHz (TPMS) Vehicle Sensors Tire Pressure Monitoring system, a Re-Learn Procedure must be performed after tire rotations, Remote Control Door Lock Receiver Module replacement or Vehicle Sensors Tire Pressure replacement. This re-learn procedure can be performed by using EL-50448 special Vehicle Sensors Tire Pressure tool. EL-50448 works on 2014 For G.-M models too. Notice:The package does not include the charger and battery Best EL 50448 and EL 50449 for you to choose : 1. EL50448 For G-M/Op-el TPMS 2. EL50449 For Fo-rd How to use EL 50448Activation Tool: Step 1 - Enter leaning mode -Set the gearshift lever to P -Put the ignition switch to ON -Enter the interface of Vehicle Sensors Tire Pressure display by DIC -DIC shows Press Set / Ctrl to re-learn -Press Set / Ctrl -The turn signal is lighted for 3 seconds and the horn beep sound twice to enter the learning mode Step 2 - Read Vehicle Sensors Tire Pressure information -Start from the front-left wheel, -Make the J-46079 or Diagnostic Tool EL-50448 antenna up against the valve core position close to the rim of the -tire sidewall -El-50448 Vehicle Sensors Tire Pressure tool starts by the start switch -Successful to read the Vehicle Sensors Tire Pressure information when the horn bleeps once Step 3 - Same method to read other Vehicle Sensors Tire Pressure information Follow the instuction above to read tire pussure of the front-right, rear-right, rear-left wheels. Turn signals is lighted for 3 seconds and the horn bleeps twice when the learning is complete. How to use EL-50449 : 1Set the vehicle into the Vehicle Sensors Tire Pressure training mode (plug the key, step on the parking brake, the car keys from the off to open 3 times, and then step on the parking brake, turn off the car keys, and then from the off to open three times; Training mode for the vehicle to start the state of the three consecutive dangerous alarm flash), if you hear the speaker sounded that the training mode has been enabled 2Starting from the left front tire, the antenna of the dedicated tool for Vehicle Sensors Tire Pressure monitoring is facing upwards against the tire sidewall near the rim of the valve stem to start the antenna. Press and release the start button and wait for the speaker to emit a chirp. Once the speaker is chirping, the information is read and the turn signal to be read at the next position will light 3When the speaker is ringing and the right front turn signal light is on, the remaining three s repeat step (2) in the following order: 3.1. Right before 3.2. Right rear 3.3.Left rear (4) When the left rear has been read and the speaker is also issued twice, the read process is completed and the body control module also exits the read model Car List: 2001 For DeVille(VIN K) Service Manual 2001 For Seville(VIN K) Service Manual 2002 For Corvette (VIN Y) Service Manual 2002 For DeVille(VIN K) Service Manual 2002 For Seville, For Seville RHD(VIN K) Service Manual 2003 For Corvette (VIN Y) Service Manual 2003 For DeVille (VIN K) Service Manual