I feel like a n00blet asking this but I can't find the answers I'm looking for.
One of my clients wants to be able to adjust the input on her navigation at all times (currently it will only let her do so under 5 mph) as well as be able to watch DVD's while driving. The normal shit you'd want to mod. It's an '07 GMT-900 Suburban all 100% factory.
Could some one point me in the right direction?