All you need is 2 more wires, a "mode" computer, and a way to connect those wires to the computer.
One wire is a constant (always on) 12v. You can tap your domelights for that.
You also need a connection to your serial data. It can be found coming from your ecm (maybe pin 11 of black connecor), or you can tap pin 2 (purple) of your driver information connector under the steering wheel.
BlazerLT, I'm not sure if you can get it to work on a 95, I haven't been able to get it work on my 96 yet.