Join Date: Jul 2014
Location: Grand Rapids, MI
well to answer your first question the sensor is attached to the bottom of your valve stem. it is possible they could have just replaced the valve stem itself and not the sensor. as for the sensor not reading they could have put the wrong one in or not reset the system correctly. i doubt that the sensor failed, it is possible but not likely. i would take it somewhere else have them scan all the sensors to make sure you don't have another one failing, these sensors only have watch batteries in them and don't last forever. after they are scanned and confirmed that all are good they can preform a reset. i work at a auto repair facility and deal with TPMS issues on a daily basis. GM vehicles are the easiest to reset out of any.