Don't be surprised if you throw a code for Knock sensors after the change out. I had to pull the intake twice - once for the sensors and again for the harness itself.
LOL. I learned this the hard way too. Helped my buddy do his knock sensors and had to do it twice because of the harness. Saved me time with my truck though.
Also + 1 on the silicone.
__________________ 07' 2500HD Classic 4x4
6" Fabtech lift, 325/60/20 Nitto Terra Graps, 4.88's, CIA, Cat back exhaust, and 220/218 .581"/.562" 111 LSA cam, PAC Springs, BBP tune, 8.1 injectors, and my cats ran away.
The knock sensors are basically microphones that "hear" spark knock and input that data to the PCM so it can retard ignition timing.
The LS PCMs have a slick function called the Adaptive Spark Scalar that makes the change more persistent and global, knocking down the entire advance curve in percentages. It does a better job of protecting the engine vs. older systems that simply react to knock when it happens.
__________________ Psychology Today studies LS1Tech "please help!!" posters:
"The Dunning-Kruger effect describes a cognitive bias in which people perform poorly on a task, but lack the meta-cognitive capacity to properly evaluate their performance. As a result, such people remain unaware of their incompetence and accordingly fail to take any self-improvement measures that might rid them of their incompetence."