XM and GMRS antenna proximity

[WRFV510]

I Just bought a 22 Jeep Grand Cherokee with a sun roof. There is only about 3 feet of roof i can put a hole in.  The XM radio antenna is also in this little area. im using a XPR5550e at 40w. How close is too close the XM antenna or will i have to worry about it. 

[gortex2]

6:" you should be good. I ran 2 UHF TLMR antennas in the back of my GC for years (total of 6 mounts on the roof). Never had Sirus/XM drop out nor issues with UHF