I have a 99 GMC Sierra ECSB with a LS1 from a 99 TA. I have been logging my knock retard with EASE diagnostics and am getting a consistant 8* of knock. I have read that 99 trucks are notorious for this problem.

I put 5 gallons of 100 octane gas in and logged again, still 8* of knock. Based on this I believe I am getting "false" knock. I would like to de-sensitize my knock sensors. I have read on other forums about putting a 10K ohm resistor in line with each sensor. The knock sensor harness that goes from the back of the intake to the pcm is where I would like to install the resistors. I would like to make a short section to install these resistors in line so that I can un-plug them when I want to.

Does anyone know the GM part number for the 2 connectors I will need.

Has anyone on this site performed this mod and if so what resistor values did you use?

Thanks for the help.

Tony