Error code P0332

I have a 2002 Chev Aval. 1500 5.3 4x4. I am getting a P0332 knock sensor error I assume I have to replace the sensors. my ? is wile I have the intake manifold off is there anything else it would be worth wile to replace at the same time. wile everything is apart. for example intake gaskets I'm sure of I have 93000 miles on the truck.
Thanks
TJ

Code does not say replace the sensor but to check it out along with the wiring and circuit to it.
332 is a rear knock sensor circuit problem.

Has the engine been washed off or cleaned?

The sensors are in a bad place under the intake where they collect water and crap.
As you will see after you get the intake off.
Look the wiring and plug in over real good.
Good Luck
MT