The 2002 Chevrolet Suburban uses two knock sensors — one on each side of the block. The knock sensors send a voltage signal to the computer if they sense detonation in the engine. When the engine detonates, it vibrates and makes a knocking sound, often referred to as “pinging.” The signal tells the computer to adjust the timing to get rid of the pinging. If you do not replace the knock sensor, you risk damaging the internal workings of the engine.
Tools Used: Tools, Set of wrenches
Install Knock Sensor
Locate the knock sensor that is malfunctioning. If the code is for the knock sensor on Bank 2, it is located on the passenger side, near the top-center of the engine. If the code is for Bank 1, it is located on the driver’s side, near the top-center of the engine.
Unplug the wiring harness connector. Fit the appropriate wrench on the hexagon-shaped body of the knock sensor. Turn the sensor counter-clockwise to remove it from the block. Insert the new sensor and screw it in, by hand, as far as it will go. Tighten it firmly with a wrench. Plug in the wiring harness connector.