Selling Point Note1: Pls Use the vehicle fitment we've provided within the body of the listing to confirm vehicle fitment.If you can not make sure which item fit for your car,please send the VIN CODE to us confirm it before order. Note2: No sensor programming Required : The Tire Pressure Sensor is 100% new and come pre-programmed specifically for your make/model/year of vehicle,need activate them by scal tool or "re-learning". Simplified Relearn : OBDII required Installation of TPMS is recommended to be performed only by trained professionals. Application For Cadillac CTS (GMX322)(from 2007-11 to 2011-03) For Chevrolet Trailblazer (KC)(from 2001-01 to 2010-07) SPECIFICATION : Replace For Part Number: 25774007 Battery Life: ABOUT 3 YEARS Operating Frequency: 433MHz PACKAGE CONTENT : NORMAL PACKET COMPREHENSIVE VEHICLE COVERAGE Installation Process 1. Loosen the tire: Remove the valve cap and core and deflate the tire. 2. Dismount the tire: Clamp the tire onto the tire changer, and adjust the valve at 1 o'clock relative to the tire separation head. Insert the tire tool and lift the tire bead onto the mounting head to discount the head. 3. Dismount the sensor: With a screwdriver remove the fastening screw and sensor from the Valve stem, then loosen the nut and remove the valve. 4. Mount sensor and valve: Slide the valve stem through the valve hole of the rim. Tighten the screw-nut with 4.0 Nm with the help of the positioning pin. Assemble the sensor body against the rim and tighten the screw. 5. Mount the tire: Place the tire on the rim, making sure that the valve faces the separation head at an angle of 180 degrees. Mount the tire over the rim.