I just put a transfer case off of a truck from 2002 (Silverado 1500 with 5.3 vortec) into my 2007 Chevy Silverado 1500 classic with the 5.3 vortec. I got the 4wd motor shafts exchanged so it wires to my truck properly but when I go to start it my truck says service brakes. Anyone know why it could be doing this?