02 Tahoe 4wd speed control sensor

[Dano1985]

I have an 02 Chevy Tahoe four wheel drive push button. Are the speed control sensors the same as on a two-wheel drive or do I need a speed control sensor just for the 4 wheel drive push button. I'm hoping that's my problem. The code comes up for the speed control sensor. It won't shift out of second gear and the tachometer doesn't work. Can somebody please help?