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Where is the Knock Sensor located on a 1999 Chevy Z71 and how do you change it?
Gnsdavisdmi
If it is a 5.3 liter engine, the Knock sensors are located under the intake manifold, when you get the intake manifold pulled off you should see a silver colored pan between the cylender heads, there will be two rubber gromments, pull them up and use a 22mm socket to get them out, and make sure you change the knock sensor wiring harness when you change the knock sensors, it ain't but $23.00 extra to do the job right, don't be a tight wad.
-Brad W
Wiki User
∙ 12y ago
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