mph Question? need help

I have an 05 Grand Prix Gt and I was wondering how I can shut the gov of so the car wont shut down at 105 mph, please let me know what I have to do and if it is possibe to do myself. Thanks

It'll require a retune of your PCM. You can do it yourself if you have access to a tuner. If not there's nothing you can do without it. Other then buying an off the shelf PCM from one of the various vendors for the GP.