2004 GMC Yukon air bag sensor

before you do anything,read this info first:Replace the passenger presence system as a complete assembly to prevent possible injury to the occupant. The bladder, the pressure sensor, the seat cushion, and the control module are assembled and calibrated as a unit. Using only some of the components in the service kit will cause the passenger presence system to operate improperly. the PPS module also has to be rezeroed with a tech 2,or it will not function properly.The passenger presence system (PPS) is a calibrated system that requires rezeroing when the system has been serviced or replaced. this is not a do it yourself job,I would leave it to the pro's.