“I have an 2004 Hummer H2 up upgrading the system to the model AVH-2550NEX what additional accessories are required for install?”

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• BASED ON THE VEHICLE MAKE/MODEL & YEAR, A CERTIFIED TECHNICIAN/INSTALLER WOULD MAKE THE BEST DECISION MAKER FOR YOU. SOME RECOMMENDED PARTS MAY NOT BE NEEDED OTHERS COULD BE NEEDED. EXAMPLE: A 12V TO 6V SET DOWN ADAPTER. IS IT NECESSARY?

  Answered by BillyC 6 years ago

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• If you have a factory radio. You will probably need a wiring harness, a Antenna adapter and a in dash trim kit. If you have already changed your radio to an aftermarket radio you may not need those things. Best Buy was real good helping me save the most money on my radio.

  Answered by Bigdaddy 6 years ago

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• Regular cables

  Answered by Anonymous 6 months ago

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