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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

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  #1  
Old 08-24-2007, 05:11 AM
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Default Re: Where is Your XM Antenna Installed

I have aftermarket XM. Installed the antenna under the passenger fake plastic air cover up where hood meets windshield. I have my nav antenna under the other one. No drops on either signal here. The stock XM antenna is supposed to be installed in the middle of the dash near the center A/C tubes.
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  #2  
Old 08-28-2007, 06:05 PM
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Default Re: Where is Your XM Antenna Installed

I thought they were supposed to outside on the roof?
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  #3  
Old 08-28-2007, 08:15 PM
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Default Re: Where is Your XM Antenna Installed

Seems to do fine where I have it.
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Old 08-28-2007, 10:53 PM
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Default Re: Where is Your XM Antenna Installed

I have a little antenae on the roof, above the front passenger seat. I assumed that was XM and On-Star. Is that right?
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Old 08-29-2007, 12:15 AM
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Default Re: Where is Your XM Antenna Installed

That is the Onstar antenna. The XM antenna is mounted in the dash near the center A/C outlet tubes.
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  #6  
Old 09-01-2007, 12:01 AM
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Default Re: Where is Your XM Antenna Installed

I have the Factory Nav and OnStar which are in the same Shark Fin Antenna. When you order factory Nav,Onstar,XM...it all comes in the Shark Fin Antenna on the Passenger side front roof.


Mine only came with OnStar and Nav. The Dealer XM add on placed my small box shaped XM \ antenna on the very front center of the roof with the lead wire tucked under the rubber windshield molding that leads into the cabin to the radio XM module.

After I added the Roof Marker Lights ,the XM antenna was moved directly behind and centered up against the Marker Light rear base.

The Antenna likes the roof mount the best ..as the large metal roof area acts as the receiving "Ground Plane" that reflects the signal to the antenna. Best recption will be found on the roof even though it will work inside,..... the roof is still the best place.

Last edited by Viet Nam Vette : 09-01-2007 at 12:03 AM.
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Old 09-01-2007, 12:35 AM
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Default Re: Where is Your XM Antenna Installed

since the signal is weaker in my area, i had to upgrade to a marine round antenna that was actually made for sirius, but it gives me full signal here most of the time. i mounted it on the passenger side edge of my roof rack.
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Old 09-01-2007, 05:20 AM
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Default Re: Where is Your XM Antenna Installed

[quote=Viet Nam Vette]I have the Factory Nav and OnStar which are in the same Shark Fin Antenna. When you order factory Nav,Onstar,XM...it all comes in the Shark Fin Antenna on the Passenger side front roof.quote]

Actually the Navagation antenna is mounted from the factory in the dash on the air duct. The XM and ONSTAR are on the roof.
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