Join Date: Nov 2008
August 31st, 2009, 8:48 PM #2
5.3 liter? If so under the intake. To test you need a DVOM set on the AC voltage scale. Put the red wire on the knock sensor and the black wire on ground. Tap/ hit the engine block with a metal hammer as close to the sensor as you can. If the sensor is working it will generate AC voltage the harder the knock the higher the voltage.