Originally Posted by Circuitguy
Getting a like unit from another Hummer H2 2004 to 2007 should work fine. Just need to have the dealer program the unit to work with your computer once installed. Make sure to get the antenna from the doner H2 to go with it.
This is incorrect.
You MUST know if you have the lux or non-lux radio system. Counting the speakers, looking at RPO codes, etc will not be 100%. I researched every RPO code of mine and saved them and the radio I bought did not work.
If you buy an incorrect radio the dealer will be able to unlock it no problem but there will be no sound. Most dealers will not refund the money if the radio does not work.
As I mentioned, pull your amp from under the console. That is the only surefire way to determine which sound system you have.
As an example, mine has RPO codes for the lux package and lux sound system, I have 9 speakers including the sub, everything points to having the lux sound system. I bought a lux radio, it unlocked just fine but no sound. Come to find out by pulling my amp, the amp is not a lux amp. Swapped radios with another forum member who did the opposite and we are both up and running.