code coming up and shows knock sensor 2

2000 CHEVROLET SILVERADO
110,000 MILES • V8 • 4WD • AUTOMATIC
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PAPAW
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  • 1 POST
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.
Aug 17, 2010 at 1:38 AM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
This engine has 2 knock sensors and they are located under the intake manifold and the manifold has to be removed to replace them.


https://images.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.


https://images.2carpros.com/forum/automotive_pictures/561653_Knock_sensor_TSB_pic_1.jpg

May 5, 2021 at 7:15 AM
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