Knock Sensors - The 1947 - Present Chevrolet & GMC Truck Message Board Network

clemsonteg · 08-12-2016, 07:06 PM

I'm having trouble with the knock sensors on my 5.3 from a 03 Silverado. I replaced them along with the harness. All GM parts ordered from Amazon. I'm on my second set of sensors and I keep receiving low voltage codes on both banks. I've gone through the GM trouble shooting guide and I have the correct resistance which is dead on 100k ohms. I do see some voltage fluctuate while running which is good according to the guide, but it doesn't list the tolerance for the voltage to be considered too high or too low. Does anyone know what values at minimum I should be seeing?

08-12-2016, 07:06 PM	#1
clemsonteg Registered User Join Date: Jul 2012 Location: Anderson,SC Posts: 953	Knock Sensors I'm having trouble with the knock sensors on my 5.3 from a 03 Silverado. I replaced them along with the harness. All GM parts ordered from Amazon. I'm on my second set of sensors and I keep receiving low voltage codes on both banks. I've gone through the GM trouble shooting guide and I have the correct resistance which is dead on 100k ohms. I do see some voltage fluctuate while running which is good according to the guide, but it doesn't list the tolerance for the voltage to be considered too high or too low. Does anyone know what values at minimum I should be seeing?



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