I have a 2010 Silverado LS. It has a black instrument cluster with only fuel and temperature gauges (besides speedo and tach). I was wondering what Im getting into trying to change to the LT style cluster with the silver color, oil, and voltage gauges. Is the wiring for oil press, and votage already in place. I know sometimes, they just have unused wires plugged into dummy connectors from the factory. I want to eventually change the steering wheel to match, as well as, the front center seat and rear seat. Thanks for any info.