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1999 GMC K3500 CCLB 7.4
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I picked up a 1999 GMC K3500 with a 454. It gave me a p0327 code for knock sensor 1. I cannot find the wire anywhere and was just going to run a new one. As best I could tell from a chiltons manual they’re ran in parallel. Which would be fine if I could find the splice on the original wire. It’s one piece all the way back into the loom. Does anyone know what pin it should go into? Or at least give me a pin location so I know where to look?the knock sensor on the passenger side is new and the connector is there and plugged in
 

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98 gmc k1500 5.7
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510 Posts
before you tear into the wiring harness , check the voltage on that wire , you should have 5 volts, if you dont then start looking to replace
 

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15,706 Posts
I doubt if the sensors are in parallel on the same circuit. The computer needs separate circuits to tell you which side is knocking
 
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