Not my first LS swap have one completed in my 1970 Chevelle. Got a two door 96 Tahoe Got the engine and trans mated. The harness and computer all set up and come on and off with no issues. I try to turn the key but getting no signal to the starter. Using the original truck ignition for signal. I have a brand new NSS switch installed using the factory plugs. Running a 2002 5.3 with a newer 4L60E Trans. What am I missing? Have the power wire from the battery on the positive post on the starter. And the purple wire attached to this small stud. Have ground running everywhere to the frame and firewall and body. Kind of stumped right now