There is 2 of them. and they are under the intake manifold. You will have to remove the intake manifold to get to them.
there is no knock sensor on 4.9l V8 motors
Under the intake manifild. There are 2. The rear one goes bad and sets the Check Engine Light.
The knock sensor are located in the valley between the cylinder heads on V6 and V8 engines V8s have two knock sensors
There are 2 knock sensor under the intake manifold, You will need to remove the intake to get to them.
underneath the window
The knock 1 sensor on a Vortec 4.8 is located on the top of the engine. You will have to remove the intake to gain access to replace it.
It is over by the starter, and screewed into the side of the engine block
Knock SensorEngine, Left Side6cly. Knock SensorKnock Sensors With Intake Manifold RemovedEngine, Top Center V8
If it is a V8 then there are 2 of them and they are under the intake manifold. You have to remove intake to service them.
There are two knock sensors on a 2004 2500HD V8 6.0 Chevy Silverado. Both of the sensors are mounted under the intake manifold on the engine.
LS does not have a knock sensor. GSR does have a knock sensor
on 4.6 intake has to come off