2004 Chevy Silverado Knock Sensor

Tiny
AMMOBOB
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 11,800 MILES
I have replaced both O2 sensors 9 months apart now the "knock sensor" is bad, according to the "idiot" light and tester from Advance Auto Parts. How is this possible or correctable? Truck still has original plugs, I've changed the oil regular. I did put flowmaster dual exhaust on the truck 3 years ago.
Friday, March 26th, 2010 AT 9:40 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Hello and thanks for donating

Sensors are not made to last the lifetime of vehicle, especially oxygen sensors. O2 sensors should actually be replaced on a regular basis just like any other routine maintenance part (i.E. Filters). The knock sensor failing at 118k miles isn't really bad, thats a lot of miles for one sensor to endure. 118k miles is also a lot for plugs, I would suggest replacing those soon as well.
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Friday, March 26th, 2010 AT 11:19 PM
Tiny
AMMOBOB
  • MEMBER
  • 1 POST
Thank you for your response. Now where is the knock sensor located on my truck/engine compartment?
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Wednesday, March 31st, 2010 AT 8:32 AM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Not sure what your motor size is but their may be 2 knock sensors. They should both be right underneath the intake manifold
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Wednesday, March 31st, 2010 AT 12:54 PM

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