i have this diagram


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is there anyone that can help me Identify #2,3,6,7, & 8?

what are they and what do they do? im pullin my hair out here

(oh almost forgot, this is a PCM diagram for a 2002 blazer)

thanxx

 

Cxxx == connector
Sxxx == splice pack.

 

ok, so why is it that i can look at these things and not get it and someone else comes along and states the obvious and...its...obvious...

i feel stupid.