Truck Repair: knock sensor po 327 code, yukon 4x4, vacuum leak

Question
My 1997 yukon 4x4 keeps setting s/e/s light when I check code it is po327 k/s low voltage. I have changed computer, knock sensor, and ran a new wire from computer to k/s. The light still comes on at various times. Please help!!

thank's
jerry hudgens

Answer
Hello Jerry,
It could be that your knock sensor circuit is working perfectly.
You may have a knock that it is reading for long periods.
Try running with it disconnected, and see if there is a clatter or knock when accelerating lightly.

You could have a vacuum leak.

Van