My service advisor said that she and her shop just completed an instrument cluster swap for a GT base owner. She said the GT1/2 cluster is plug and play in the base GT. I am taking her word for it so I can't vouch for the info. This fascinates me for one simple reason. I own a 2014 Silverado and they have made it prohibitively expense to upgrade the internals (radio, cluster, steering wheel controls, etc.). To get steering wheel audio controls, you have to upgrade the instrument cluster (no kidding). I won't even go into the difficulty with aftermarket radios or screen upgrades. It is ridiculous. The fact that you can swap clusters in the Stinger with no great effort is refreshing.