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PolarBear · 11-01-2017, 11:59 AM

Anyone here know if the Onstar antenna will work for other purposes? In the Suburban I will have 2 GPS enable devices, so I will need two antenna's (actually 3, but it's not a big deal on the third). I was already planning on putting a GM XM antenna on the roof for my Sirius, so I was thinking if I got the XM/GPS/Onstar antenna it would prevent me from putting 2 up there. I am wondering if I can use the Onstar for a second GPS instead though, or if not a cell phone booster, and have to go with two antenna's anyway. Or if I can split the signal off the one GPS antenna to work two GPS devices?

11-01-2017, 11:59 AM	#1
PolarBear Ebearnezer Scrooge/Power Member/Lips Join Date: May 2006 Location: Hamilton, Mercer county Posts: 4,141 iTrader: (16)	GM Onstar/Navigation antenna Anyone here know if the Onstar antenna will work for other purposes? In the Suburban I will have 2 GPS enable devices, so I will need two antenna's (actually 3, but it's not a big deal on the third). I was already planning on putting a GM XM antenna on the roof for my Sirius, so I was thinking if I got the XM/GPS/Onstar antenna it would prevent me from putting 2 up there. I am wondering if I can use the Onstar for a second GPS instead though, or if not a cell phone booster, and have to go with two antenna's anyway. Or if I can split the signal off the one GPS antenna to work two GPS devices?