GM Authority (blog)General Motors (NYSE:GM) Utilizes New $750000 Antenna Testing Facility to …Satellite Radio PlaygroundIt looks like Sirius XM (NASDAQ:SIRI) Satellite Radio reception is getting an upgrade thanks to “wireless signal super-receivers” …GM Uses $750000 Antenna Testing Facility To Optmize Receiver StrengthGM Authority (blog)all 2 news articles »