Well, huge thanks to Chris White @ White Auto and Media, rcvd & installed my Denali cluster after work today. Super easy - 2 tools: 15 Torx & 7mm socket.
2016 Denali cluster GM part #84254168 for 2016 GMC/Chevy, approx $400 new + programming cost. Best money spent on coolest mod to our trucks.
Stock Sierra SLT
Denali cluster
20 minutes tops for install