GM began selling vehicles with dual-mode (analog/digital) hardware in 2004 after all appeals to the FCC to overturn its ruling had failed. All GM cars and trucks are now likely sold with digital-only equipment. Some GM vehicles produced between 2002 and 2004 may have been equipped with analog hardware that is digital ready, meaning it can be upgraded to accept a digital signal. To find out if your vehicle is digital-ready, click here and have your VIN ready. If you do have equipment that can be upgraded, GM will do it for you, including parts and labor, for only $15 if you agree to a $199 1-year subscription to OnStar.
Nevertheless, it's a bum-deal for those GM customers with older OnStar models that can't be upgraded, as their service will ride off into the sunset on New Year's Eve thanks to the FCC.
[Source: Straightline, GM]