Knock sensors on an LS

[DBasher]

I had a scan done on my 05 Silverado after the check engine light came on, it came up as a bad knock sensor...#2 I think. Poking around the Internet it looks like it's one of two under the intake. Besides two new sensors, sealing the plugs with silicone and new manifold gaskets is there anything else I should be doing? Do I need any special tools?

Thanks in advance.