1. Do I need to get the supercharger oil changed? I saw something about it in the owners manual. Also how much does this cost to have done?
According to Eaton and GM, the SC is sealed for life. So change the oil once every two years.
I do it once a year. Instructions are in Techinfo.
2. Do the tranny fluid and radiator fluids need changed?? I have heard bad things about tranny fluid flushes. Also is the radiator fluid easy to change?? Anyone have directions on how to do it.
We've seen no evidence here that flushing is bad, unless possibly on a VERY high mileage unit that'* never had a flush before. I flush once a year. I suggest you start with a pan drop and change the filter. That'll get 1/3 of the fluid.
3. I just ordered new Taylor Spiro Plug wires. Should I upgrade to better plugs like Platnium or something?? Are the plug hard to change??
Ditch the Taylor wires. We've had alot of bad stories with them, myself included. I had 2 bad sets out of the box, and another failed prematurely. Run Belden Premiums. If this doesn't convince you, use an Ohmmeter to check the resistance of the wires BEFORE you install them, and again after you route them from the coils to the plugs before final connections. Treat them with kid gloves, and report your resistances back here. Treat them very delicately if you insist on using them. Also add wire loom (protective cover) everywhere they touch anything.
Consider changing your front O2 sensor for performance and efficiency. They're getting tired at 50k or so. Ignore the rear O2 sensor, it'* purely for emmissions.