How To Repair AC and Winning A Car

1. How do you add cruise control to a car. Crown Vic and others. 
2. Should I change my transmission fluid before a trip?
3.Can I block off my rear ac and fix my air conditioner?
4. 2000 Chevy 3500 1 ton dually why does my rear fuel tank not work?
5. 2013 GMC Sierra Why does steering have no assist?
6. Winning a new car!