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International Automotive Technicians Network
Re: GM Knock sensor issues
Posted to Technical Tips Forum on 10/7/2023

YES!!!! I had a job that one of the guys did and came back. Put the lab scope on them and 1 was dead.

got 2 more and both were dead on arrival. I hooked up the lab scope and tested them before putting it back together. finally, the 3rd one worked. Login to read more.