anyone know where this is located

 

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The transfer case is controlled by the GEM (Generic Electronic Module) which is attached to the back of the under dash fuse box.
What sort of problems are you having with it?

 

i lost my 4x4 it shifts but wont ingage . the shop said the computer they put it on came up with that then when they backed it out the tourqion bar broke what luck .thanks for repling.

 

Does your truck have ESOF (Electronic Shift On the Fly)? That's the one with the **** on the dash. Or does it have the lever on the floor?
If you snoop around in the forum here you'll find quite a bit of info on problems like you have.

 

it has the lever on floor but you can engage while driving.