knock sensor help

[palumbogio]

I have a 2001 gmc sierra 1500 slt 5.3l v8 the problem I have is code p0327 and p0322 I changed the knock sensor(acdelco  213-3521)  and the pig tail cable (genuine gm eom cable )the sensor are torqued to 15ftlb tested for resistance and the riding was 100.2  on both sensor seems like that the sensor and the pigtail cable are in working condition hook up a voltmeter oc ac reading  and tap the block and The voltage increase wile tapping on both sensors tested the wire from the ecm to the sensor hook up plug and I got continuity on bot wires are any more test to check the sensors?

I clear the code several time and I reset the ecm but the codes still came back what you guys think do I have a defective ecm 

Please any advise will be very appreciate 

Thanks in advance for your help

[sefiroxx]

Check wiring harness further back towards ecm

[palumbogio]

All ready done that I even checked for corrosion on the blue and red plug of ecm cleaned with electrical connector cleaner still having codes

[riverbanks]

Did you change both?

[palumbogio]

yes I did 

 

[riverbanks]

Darn truck,give me a bit

[riverbanks]

Give utube a shot,I remember problem solving for this,on there,post back, we'll get you there

[carnau]

Gonna try to help you a little bit. If both codes are setting back go to the end of the pigtail and check the resistance (which I see you did.) It should be 90k - 110k ohms. If that tests good, Go to the PCM and Test across terminals 11 and 51 of the Blue connector (C1) and you should have the same resistance. If you do, you have a Bad PCM.

 

[greatmizzou]

I recall reading that the computer needs to have the codes cleared several times before things appear normal to the computer and the codes stop being thrown.

 

 

this is a concern for me as I plan on replacing mine as well and I currently have no issues, but it appears rather common to start throwing codes for no reason after replacement

[riverbanks]

Cleared several times,is worth doing,I'm wondering if a symptom elsewhere is the cause? should all sensors be looked at on a scanner,darn it,he bought the good parts