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Knock Sensor light

Heath
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Heath Enthusiast

Heath

Posted
Posted

Good Morning, I wanted to see if anyone has knowledge of the knock sensors in the 2004 GMC Sierra 1500 5.3 models and what they affect when failing? My light started coming on last week and the mechanic says the intake has to be removed to get to the sensors. Just want to know how serous an issue this is to be corrected. 

Thanks

Heath

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

It will still run forever with the knock sensor codes but it will be down on power. Any time a knock sensor code is present the computer will remove ignition timing thus removing power from the engine.

 

Knock sensor failures are very common on those trucks.

Heath Enthusiast

Heath

Posted
  • Author
Posted

I'm looking for part numbers for gm  knock sensor and wiring harness....If anyone has information on these please let me know.

txab Senior Enthusiast

txab

Posted
Posted (edited)

Rockauto is always a good source for research. Also 1aauto

 

AC DELCO

 

Knock sensor 2133521  is what I used on my 2004

 

Harness 12601822

 

Confirm these parts yourself. Watch out for counterfeit parts when purchasing

Edited by txab
Heath Enthusiast

Heath

Posted
  • Author
Posted

 

 

 

I have the knock sensor gm part number- 12589867

the model truck I have is a 2004 gmc sierra 5.3 L 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

The number post above and these following numbers are all the same sensor.

 

Alternate/OEM Part Number(s): 10456603, 12589867, 213362.

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