Hello everyone! Please tell me how to connect the radio to the standard wiring Hummer H2 2003

 

Buy a wiring harness adapter, steering wheel control adapter (if the radio you are buying has steering wheel control capability), and an installation kit.

Strongly suggest going to https://www.Crutchfield.com (Car Audio>find what fits my car) and putting in the vehicle info. That will tell you exactly what you need since you apparently are unsure.

 

And another question, who can help to paint to which wires to connect such a security system

 

The attached might help.....

 

And if you could not paint which wire to connect where exactly, everything would work correctly

 

Good luck with that..... I'd suggest finding someone experienced in installing that sort of thing.

 

And you would not be able to paint which where to connect, otherwise sometimes experts are confused.