Question about 2004 GMC Envoy

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Im trying to lacate were the knock sensor byut i could'nt find it.

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There are two on the 4.2L. Both are mounted on the intake side (left side) of the block. One towards the front, one towards the back. They are down low on the block. Just small matchbook sized black boxes bolted to the block with an electrical connector.

Posted on Sep 26, 2010

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Posted on Jan 02, 2017

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