Description:For GM vehicles equipped with a 315 or 433 MHz 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 special tool EL-50448.Also works on 2014 GM modelsEL50448 Auto Tire Presure Monitor Sensor OEC-T5 EL 50448 For GM Opel TPMS Reset ToolHow to use EL 50448 Activation ToolStep 1-Enter leaning modeSet the gearshift lever to "P"Put the ignition switch to ONEnter the interface of tire pressure display by DICDIC 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 modeStep 2-Read tire pressure sensor informationStart 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 sidewallEl-50448 tire pressure tool starts by the start switchSuccessful to read the tire pressure sensor information when the horn bleeps onceStep 3-Same method to read other tire pressure informationFollow 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.For certain vehicles equipped with a 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 special tool 50448Packing List:1 x EL-50448 Tool

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