This is the Hi Pressure switch that will plug into the rear of the GM compressor, your electrical connection inserts straight into this TWIN PIN plug (not single but TWIN PIN OK...!!).
Comes with the locking "C" Clip and seal as shown.
Genuine GM Part.. and important that this be 100% functional or you will burn out your compressor before its time, seize the bearing and STOP.
This unit works for: