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Originally Posted by heavyredchevy
How can you tll if its bad... Would the check engine light come on... or is that only if it senses knocking
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Very good question and I should have included it in my other post.
If there is no knock detect under full throttle it can set a code. Also if there is constant knock, it can also set a code.
Unfortunately, it can't detect if the sensor is reporting more knock than actual but it is not on constantly (which will set a code).
A scan tool can be used to retrieve the knock count and that can help determine if it is bad.
On my 90 K1500, it is not uncommon for me to see knock counts around 50 to 100 for my 30 minute commute home.
Of course, the engine is original (except for timing chain and intake) and 122K miles.
//2000CAYukon