I have a compass in my rear view mirror, does that mean I already have a GPS Antenna?
Senior Member
Joined: Sep 2008
Posts: 6,126
From: SE Michigan
I believe the 2 are independent systems of each other.
GPS pinpoints your location and the compass only tells you what direction you are facing.
I have had to reset/re-calibrate the mirror compass and the GPS (OEM) will worked fine.
GPS pinpoints your location and the compass only tells you what direction you are facing.
I have had to reset/re-calibrate the mirror compass and the GPS (OEM) will worked fine.
Super Moderator
Joined: Jul 2007
Posts: 13,101
From: Boat Town USA MI
Correcto mundo. Our kid car (passed between them) Saturn Ion has the same mirror as the H3, same size and shape w/o any onstar button etc..., similar vintage older GM all have the illuminated compass with zero GPS capability/no GPS antenna.
Senior Member
Joined: Jul 2012
Posts: 9,016
From: C-Town
Does your H3 have a shark fin on top?
Last edited by hummerz; Nov 8, 2019 at 11:50 AM.
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