Originally Posted by
Buzz
With the 0411 PCM the L31 Vortec engines (Express / Savana) were equipped with Resonant style knock sensors, just like the LSx engines were. There are no OEM defined tables / settings for Flat Response style knocks sensors with these engines using a PCM (0411).
If you conduct an internet search regarding operating an LS2 engine with a PCM, you will read for hours about all of the impasses to attempting to correctly integrate Flat Response knock sensors and a PCM (0411).
Some have tried (and failed) to use the knock sensor settings from a 4.3L V6 using Flat Response knock sensors and a PCM (0411).
Their are couple of companies who offer a wiring harness and PCM that will supposedly achieve this - they don't work. These are typically sold as LS2 conversion kits. Anyone using one of these setups has no knock protection.
Most people who have swapped in a 24x CKP LS2 have mounted the Resonant style knock sensors.
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