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[Klaus]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by mattyg50:
klaus

the unit im looking at is prt# 15230099

with nav antenna
where do you mount the antenna

thanks </div></BLOCKQUOTE>

The NAV antenna mounts under the dash facing the windshield.

Part number 15230099 should work in your 2003.

You will need to add a VSS circuit to the radio connector wiring harness. Also, if you are looking at a used unit, there is another problem. The unit will be locked to the VIN of the vehicle it came out of. GM dealers can unlock them with a Tech 2. However, since a 2003 H2 did not come with NAV as an option, the unlock option will not be available on the tool.

The dealer can tell the Tech 2 tool that you have a 2004 H2 which will allow the tool to unlock the NAV unit. In the past some dealers have either not been able to unlock the NAV units, while other dealers have no problems at all.

Don't forget you need the DVD NAV Disc as well. They are expensive.