piston slap. very common
The 2002 Silverado 4.8 liter engine knock sensor is located on the back of the crankshaft. The back engine cover will need to be removed in order to view the sensor.
SEAT BELT
The knock sensor is located on top of the block in a 4.8 2002 engine. The intake will have to be removed to get to the sensor.
on a 6.0 ltr eng.it is located under the intake manifold there are 2 of them
Its under the intake manifold.
What might cause your 2002 Silverado 4.8 to run rough under a load could be clogged fuel injectors or a clogged fuel filter. It might also run rough under a load because of a transmission sensor issue.
NO it will not. You need to check the coils / coil, Plug wires, spark plugs, Distributor cap and rotor if it has one. You did not say what size the engine is that would help. You will need to scan the engine with a engine scanner more then likely to find the problem.
A gasket leaking will cause this noise. Did you torque to the right specs and in the right sequence then retorque after 3 heat cycles.
check the pcv valve
Yes.
Short some where.
There are 2 sensors on the 6.0L and both of them are under the intake manifold. You can not see them are even get to them until you remove the intake.