Nut Question
 

Re: 1995 Buick LeSabre 3.8L 4dr Sedan, Limited. I am replacing the neutral switch that is located on top of the trans. Is there anything special about the nut that is holding the lever on. The center (circular area) is red and that is preventing me from just going and putting a socket wrench on it. I don't know what the meaning of that red area is. Thanks. Bob