? about impact sensors
 

I have a 07 escalade, the service air bag light came on. I took it to a shop and they said the front right impact sensor is bad. Can anyone tell me if there is a difference between the left and right and if there is any major precautions to take when changing it out. Also will the light shut off when I change the sensor or will it have to be taken somewhere to have the system reset? Someone please help. Thanks for your time and help.