I need an answer quick!!!!

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Sepiroth

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If you were able to get the 2008 H2 schematics and the schematics for your truck, I am sure it will be possible to match up.
 

Rollin Thunder

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the electronics are different from the gmt 800 to the gmt 900. They simply wont match up with out changing every possible thing that is ran through the radio, to gmt 900 parts, Including, onstar, amp, sub, and you will have to upgrade it to the GM lan system. Which GMT 800's dont have. IMO Aftermarket ones are also alot better than these. Gm's sound systems are not as good on the 07+ as they are on the 06 and back. :thumbsup:
 
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