Re: 5.3l engine knock
You most likely need both knock sensors and probably a knock sensor harness. If it is setting a code there is a problem that isn't going to just "go away". Those trucks tend to get water in the knock sensor bores and it causes corrosion on/in the sensors and connectors. I have done more of them than I can even count for the exact code and every single one of them was due to water in the knock sensor hole....
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