6l90 tutd pin 7

[williamn72]

I have a 2008 Silverado that a did a 6.0 with 6l90 swap with a new engine harness. i have everything running fine been dirves great.. trying to get the tutd to work with the stock ( bcm ) setup iv swapped everything over 6l90 steering column and wire harness 6l90 instrument cluster, brand new shiftier lever , hp tuner is been set up for it.. come to find out the engine harness doesn't have pin 7 in the transmission plug my question is if don't want to buy anther harness just for 1 wire so where does the pin 7 go to in a stock set up with a body control module in a 2008- 2013 silverado.