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Where is the knock sensor located on a 2005 gmc sierra 1500 4x4 5.3 L

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Do not replace with Autozone knock sensors unless you feel like doing the job twice as I found out the hard way. I replaced mine and a week later the check engine light came back on. Went to the dealer and was told they have seen this problem many times before and to use oem replacement parts only. The two sensors and harness ran me about $230 from the dealer but no more engine light and no more sputtering. Hopefully I can return them to Autozone as soon as I find the receipts.

Posted on Apr 09, 2012

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