2004 Chevy Silverado Knock Sensor

2004 CHEVROLET SILVERADO

11,800 MILES • V8 • 2WD • AUTOMATIC

AMMOBOB

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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.

Mar 26, 2010 at 9:40 PM

BLUELIGHTNIN6

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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.

Mar 26, 2010 at 11:19 PM

AMMOBOB

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Thank you for your response. Now where is the knock sensor located on my truck/engine compartment?

Mar 31, 2010 at 8:32 AM

BLUELIGHTNIN6

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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

Mar 31, 2010 at 12:54 PM