How close can i put my gmrs antenna to my XM radio antenna.

[WRFV510]

Just bought a 22 Jeep Grand Cherokee and it has a sunroof. I drill holes but there is only like 5 inches in front of the xm antenna to put the antenna. id be using a Laird ETRAB4500N or a ETRAB4503

[Newb]

Just a suggestion, slap a magnetic mount up there to see if there is any interference. Since the radio units in cars now a days have sooo much built into them, security, GPS, AM, FM etc. you might want to put the radio through it's paces while transmitting to make sure the receiver in the car radio is tight enough to filter out the RF from the GMRS radio.  Is there a second antenna on the vehicle for AM, FM, remote start and door locking?

[WRFV510]

i think the antennas are in the rear glass. 

[Newb]

Per MOPAR the shark fin is for everything.

[back4more70]

My mag mount Nagoya is about ten inches in front of my roof antenna, there doesn't seem to be any issue.  But I second the suggestion to go with a mag mount first.