Hello,
The knock sensor is located under the intake manifold of your Suburban.
Here is a video of the replacement of the knock sensor:
https://youtu.be/9kcLNY13ryE
I have also attached replacement procedure.
Please let me know if you have any questions.
Thank you.
Images (Click to enlarge)
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Tuesday, July 13th, 2021 AT 11:43 AM