Added NAV to 03, GPS not tracking position - Anyone know why?
 

I added a factory 05 H2 touch screen NAV unit to my 03 H2, had it unlocked at the dealer.

My problem is, the unit updates the location every minute or so. I thought maybe the antenna was not getting a good signal so I put it on the dashboard to see if there would be a change... same thing, updates when I stop or occasionally when driving. Yes, it was grounded when on the dash.

Any ideas why? The only thing I can this is the antenna is bad. Ideas?

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

Hi is the vehicle speed sensor wire hooked up? I only ask because your truck never had navigation and is was not a option in 2003. If the vss wire is not hooked it will not navigate correct. Hope this helps

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

I would have to say there is no VSS. I can program the destination while driving.

It started working! I suppose I just had to be patient. After posting my wife and I went to dinner; it slowly got better over the first 5 miles, by mile 10 it was tracking perfectly. On the way home still perfect... :perfect10s:

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

Hi if it stays tracking as you move don't worry about it, but if it stops tracking as you move or takes a min. to track you then add the vss wire.

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

you just need to let the antenae calibrate itself to the current location on the vehicle. I have had three gps headunits in my vehicle so far,first stock worked great except hated you can't listen to radio while navigating, second jesen same thing you described and now KENWOOD, best purchase so far!! I have one in my avalanche and love it so much I replaced my H2 head unit to it. Hope it all works well, and I still have an 04-06 stock Nav head for all you other lookin. With map disc!!

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

...or if you live in a location with a lot of tunnels. The VSS will help keep you're course on track while underground.

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

so what you`re saying is that the 05 H2 touch screen NAV unit will work on an `03 H2 without any mods? Anyone have a unit laying around that you would like to get rid of?

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

It works perfectly. Get the antenna mount as it serves as the ground for the antenna. Doa search as well, the dealer must tell the Scan Tool it is an 04 to get the option to unlock the Nav radio.

Re: Added NAV to 03, GPS not tracking position - Anyone know why?
 

Thanks,now all I need to do is find a nav unit for sale.