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Re: Top end 5.3 please advise
The knock sensors do not live in an air tight environment and are susceptible to water intrusion and do corrode. When you pull the intake off, take a look at them and then decide. Change the knock sensor harness as well, if the sensors are corroded. The parts are readily available at most parts stores, and not cost prohibitive. Most likely, the sensor seals will have hardened and should be replaced if you pull the sensors
If you need a hand, I live just up the road in Manchester. Shoot me a PM if you need assistence
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