2006 Silverado wont start? VATS? Security light flashing. Help!??!

[NastyBuzzard]

So recently I did a body/chassis swap on a 2006 4.3 ecsb 2wd silverado bare bones work truck, I put the body onto another 2006 4.8 4x4 ecsb chassis which was a work truck but did have cruise and a couple other little options.

For security/VATS. I took the body control module from the 2006 4.8 dash harness and plugged it into the 4.3 dash harness as well as took the key switch from the 2006 4.8 steering column and put it into the 2006 4.3 steering column.

Cranks over but will not start, security light keeps flashing. Is there such a thing as a VATS module? What does it look like? What am I missing?

Also What is this?



Also I have one plug from the chassis harness that I cant find the other end coming from cab harness. Even the 2006 4.3 chassis had the plug end but can't find it anywhere. Look familiar?