RHOWARD2GO

2015 Sierra 1500 All Terrain. Trying to confirm if there is only one power and ground going to the instrument cluster. D.I.C. is not booting up with the infotainment center. Screen is just blank like no power, but the analog gauges work fine. Gauges do not go through the check cycle. They just come to life and are reading normal. None of the back lighting works. None of the steering wheel controls work except for the cruise control. Heated steering wheel operates, but the indicator light does not illuminate. I have completed the ground fix behind speakers in the upper dash. Checked all fuses in the truck. Nothing has worked to get to the screen back. Not even a flicker of light. All blinkers work fine on exterior of truck, no feedback in the instrument cluster. Code: U1510-00 stored in cluster, but that generally relates to the shutter grill or an HVAC control malfunction. HVAC works fine, and this truck does not have the shutter function installed. I'm at a loss. I'm considering ordering a Denali cluster form white auto media already programmed for the truck. If I order and install and still have no digital function in the cluster, I'll be some kind of ticked. I think the D.I.C. has went out, any ideas? Thanks for any help!