I have the 2018 Duramax Regular Bed Crew Cab WT, Only Cruise Control On My Wheel. I Bought the wheel with heat, Audio Controls, Dash Controls. Purchased the denali cluster from WAMS, the wheel clock spring. i have the IOB Radio 7" screen. currently looking at pinouts but none of the circuit numbers match up, trying to decipher if it is doable with the 7" IOB. any input that may help out?