Having problems with your 2001 Chevrolet Suburban ?
How to replace a knock sensor - 2001 Chevrolet Suburban
There is 2 of them they are below the intake manifold do both while your in there check the connectors on both of them as the wells that they sit in fill with water the intake is not that hard to remove
Repair Help & Product Troubleshooting for 2001 Chevrolet Suburban
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