h2 aftermarket cd/dvd/navigation hookup

[Hellz]

best advice is to go to the manufactures website and start there.

you do realize you arent giving us a ton of info here, plus asking us to do all your research.

year and model of car ( assume it is a H2, but never know with kids now adays)

doubleDin will fit, but might need a face plate
harness- there are many options out there. do you want to keep the door chimes and onstar option?
expect to pay about $100 for the harness
you keeping the stock speakers?
you keeping the stock amp to power the speakers?
you running a sub?
you running an aftermarket amp?

most places will charge about $100 to $150 to install the deck.. might be able to get a better deal witht he deck and DVD player/headrests.. i would give that some consideration as opposed to doing it yourself with no experience. getting it to work is one thing, but having it look sloppy or professional is another.