Originally Posted by Silver8ado

Just swapped a l96 and 6l90 from a 2012 into my 2007 silverado.

Everything plugged in except for these two wires:
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Theyre located on the drive side frame next to the transfer case.

Any idea what these wires control?
Any solution to get them to mate

Originally Posted by Silver8ado

Recently purchased the motor, trans, transfer case, and wire harness from a 2012 silverado to go into my 2007 silverado. Everything has been swapped into the truck in place of the old 5.3. Everything bolted up and plugged in except for a wire or two to the transfer case.

My question is how can a plug-in on the harness not hook up to the transfer case it originally came with?

Also, what would it take to fix this and would it only take a new bcm and a tune to get everything including the 4wd to work?

The garage is completely lost so any help is appreciated!

Originally Posted by DrX

Are you saying that these are part of the 2012 harness you bought? Was there a sub harness attached to the new transfer case?