On my Jeep with a 430N radio/Nav the GPS and Sirius antenna are combined. My cargo rack blocked the Sirius signal, so I replaced the antenna and found I no longer had GPS.
On the Jeep, it is easy to get to the antenna, so as soon as I find a new mount, I will replace the Sirius antenna with the original antenna.
David
2012 Fleetwood Discovery 40G
2012 Jeep Wrangler Unlimited
2019 Jeep Wrangler Unlimited