I had just a little too much timing climbing this long grade. I heard it ping on one bank a few times with the knock phones then instantly went away when the PCM pulled advance.

 

The KS wiring is as follows, no other wiring setup will work with Flat Response sensor setting enabled. If you try those junk 2 wire conversion harnesses with ground wires, you have to use the Resonant setting but that is not right at all and will make you pull your hair out. It is a mystery to me why anybody makes those garbage conversion harnesses and do not offer the correct harness extension that has 2 wires for each sensor back to the PCM as required.

Bank 1 Signal C1 Blue Pin 9
Bank 1 Reference C1 Blue Pin 49
Bank 2 Signal C1 Blue Pin 10
Bank 2 Reference C1 Blue Pin 50

Bank 1 is the LH sensor and Bank 2 is the RH

The Resonant knock sensor setting makes the PCM look for signals on C1 Blue Pin 11 and Pin 51 vs the Flat Response setting pins listed above.

In the knock cylinder table, Zero = Cylinder 1 then continues through the rest of the engines firing order.

The later 4.3Ls use 1 Flat Response sensor wired to the Bank 1 input/reference pins listed above on both the P01 0411 and P59. Nearest I can tell both the P01 and P59 should have the ability to see both knock sensors but I have only tested it on the P59. The only one I have spent time getting right is my 383. I will also state that pinging on either bank causes the timing to retard with my P59 so the P59 definitely has the hardware to work with 2 flat response sensors wired correctly.

Edit forgot to mention Pin A is the signal and Pin B is the reference at the knock sensor connector. With the knock sensor connector plugged in, the top side of the sensor facing you and the connector at the bottom, Pin A is on the left. Most connectors are marked A and B in tiny letters.

Also Mike Noonan of EFI Connection also mentions the ability to run either knock sensor in his book. I thus am not the only one claiming to have made it work.

I am working on a 24x P59 calibration based off a LQ4 6.0L DBC van to run the 24x CNP setup I am swapping on my 383. I am sure I can get the flat response knock sensors working on it too with some copy paste from the current 4x/Distributor L31 based calibration.

 

I can confirm that flat-response knock sensors work with a P59 as described above. I had to reduce the sensitivity a little bit above 4000 RPM due to false knock, but other than that it basically just worked on the first try.

I set it up to use "engine mode" rather than "cylinder mode" because I wasn't sure about which sensor was on which side of the block. So I don't get per-cylinder knock detection, but I'm not sure there's much point in having it.