K15004.3

I need help identifying this wire. It appears to have a crimped connector maybe a ground wire but it’s tied into the wires running to the transmission/o2 sensors looks like either black/white or black/silver can’t tell. I hooked my meter to it and had no voltage when truck is running so I’m assuming it possibly bolted to a stud behind the rear passenger side of the motor or possibly around the intake manifold. Can someone tell me if they have any idea what it is?