2007 tahoe 4x4 help

['07Tahoe]

I just replaced my TCCM and now my 4x4 indicator light will light up for a few seconds when I crank it up then they go out. The service 4x4 message is on but no check engine light. Anyone have a idea

 

[MO Viet Vet]

Before you get too deep in the weeds I would disconnect the battery for 15 minutes and then reattach and see what happens.

 

['07Tahoe]

I tried it for 10 minutes. I will unplug it for longer. Thanks

 

[Chino601]

I just replaced my TCCM and now my 4x4 indicator light will light up for a few seconds when I crank it up then they go out. The service 4x4 message is on but no check engine light. Anyone have a idea

You need to program the TCCM to the Vehicle.