I have a knock sensor code on my 2002 Tahoe, how do I replace it?

SOURCE: knock sensor code, p0330

The knock sensors either work or they don't. When they do not, the light comes on. All that a knock senor is is a piezo crystal that vibrates at the frequency that is comparable to engine "knock", and sends that yes/no signal to the ECU. There are 2 knock sensors, and both are bolted to each side of the engine interior walls, under each cylinder head. You have to remove both of the intake manifolds to access the knock sensors and their wiring.
Price to pay? My flat rate book suggests 3.7 hrs to change both. 3.7 hrs times your local labour rate, plus the price of the 2 sensors and/or wiring, and the price for the gaskets for the upper & lower manifolds. Depending on your location, you could quickly spend over $500.00.

SOURCE: Have a 2002 Cadillac Escalade AWD 6.0 Knock sensor intake manifol

If you're apprehensive about doing this work, buy a Haynes repair manual (about $20), It shows you how to remove the manifold

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SOURCE: i change the knock sensor in my chevy tahoe 2001

The problem is not the sensor but most likely the blue wire has an open circuit between the sensor and the computer aka the pcm ..You are going to have to look real close at the sensor end of the harness it may be a broken wire right inside the insulation , hard to find good luck pcm connector c1 is where the other end of the blue wire will end up ..there is nothing between the computer and the sensor. just wire an ohmmeter and some patience im sure you will find it...hope this info helps..

SOURCE: find part location

There are two knock sensors on your vehicle. Both are located under the intake manifold. I would replace both if going to do the work yourself. There is also a wiring harness kit for the sensors you should replace. It is a difficult job.

SOURCE: how do you replace the knock sensor on a 2005

The knock sensor should be on each side of the engine block. These are single wire connectors and require no special tools or tricks. Simply unscrew and install.

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