Originally Posted by iclick

It updates the firmware on the HK head unit. I've done it about five times, going back and forth and finally settling on 8.19 (latest), and never had a problem. I wasn't aware that CD's came in different thicknesses, and that's a new one on me. I use very old CD-RW 4x.

Originally Posted by Tinkermc

my radio seems to work well but many times I hear people doing update having troubles. I think since mine ain't broke I won't fix it.

Originally Posted by hoosierhog88

I took a look at the HD site. The following is in the directions...

The radio will automatically update the software. This process will take about seven minutes. A message will inform you of the progress of the update. The radio will power down and restart automatically twice during the update. If the CD appears jammed or will not eject, turn off the radio, turn the ignition key switch to OFF, pull the vehicle maxi-fuse, and wait five minutes before replacing the fuse. Try ejecting the CD again once power has been restored.

Originally Posted by driven2fish

I have an 06 SG and did the update. I read if it gets stuck to pull the maxi-fuse. I always have bad luck and since they put that in there I knew I would have to do it. CD would not come out and I did the fuse thing and waalaaaa it came out.

good luck