Mechanics

CHEVY KNOCK SENSORS

2000 Chevrolet Silverado

Engine Performance problem
2000 Chevy Silverado V8 Four Wheel Drive Automatic 110000 miles

I have a code coming up and shows knock sensor 2 and wondering where the knock sensor is located on my 2000 4.8 engine.
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Papaw
August 17, 2010.



This engine has 2 knock sensors and they are located under the intake manifold and the manifold has to be removed to replace them.


http://www.2carpros.com/forum/automotive_pictures/561653_Knock_sensors_00_48_1.jpg



There is a TSB published on this problem with this engine. It has to do with water getting into the hole where the sensor is installed. The cure they came up with is to use black silicone and build a dam around the hole with an opening in the back.
Here is a picture of it.


http://www.2carpros.com/forum/automotive_pictures/561653_Knock_sensor_TSB_pic_1.jpg


Wrenchtech
Aug 17, 2010.