5BrothersFabrication
Zzzzz....
99-03 5.3, ok, the tube that runs out from the exhaust manifold and up into the intake, will a set of headers have this? Is it a requirement for the engine to run properly?
It has a stand-alone harness flashed to delete a bunch of unnecessary things, I should pull it out of the box and try and see if it has a plug for that sensor.