hello I have a 05 z71 suburban with the 5.3 engine in it. one day I was driving and the check engine light came on so I naturally had it checked out. came up with 3 codes p0237 twice and p0332 once. so I had the knock sensors replaced along with the wiring harness to them, had the codes cleared and a couple days after they were replaced all the codes came back, has anyone had these problems?

 

OBD-II Trouble Code: P0332 Knock Sensor 2 Circuit Low Input (Bank 2)

That points to the ECM/PCM being the culprit of your problem.