Descriptions: Most of For G.M vehicles equipped with a 315 or 433 MHz (TPMS) Tire Pressure Monitoring 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 EL-50448 special tire pressure tool. EL-50448 works on 2014 For G.M models too. Introduction : 1.The tire pressure sensor on models in & after 2012 can be read, only with some specified diagnostic tools. 2.Before tire pressure monitoring system works normally properly, the body control module will record ID information of each position in the tire pressure sensor. 3.Please refer to the specific methods as follows: Step 1 - Enter leaning mode -Set the gearshift lever to P -Put the ignition switch to ON -Enter the interface of 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 tire pressure sensor 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 tire pressure tool starts by the start switch -Successful to read the tire pressure sensor information when the horn bleeps once Step 3 - Same method to read other 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. Please Note : For certain vehicles equipped with a 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 50448 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 2003 For Seville (VIN K) Service Manual 2004 For Avalanche/Escalade/Suburban/Tahoe/Yukon(VIN C/K) Service Manual 2004 For SRX (VIN E) Service Manual 2004 For XLR (VIN Y) Service Manual 2005 For Avalanche/Escalade/Suburban/Tahoe/Yukon(VIN C/K) Service Manual 2005 For Corvette (VIN Y) Service Manual 2005 For CTS (VIN D) Service Manual 2005 For DeVille (VIN K) Service Manual 2006 For 9-7x (VIN S/T) Service Manual 2006 For Avalanche/Escalade/Suburban/Tahoe/Yukon(VIN C/K) Service Manual