Just installed the z1 in a 2004 2500HD. Works great, Nav, ipod, and XM are perfect, the only problem that I'm having is that when I turn the key off the radio runs through the presets. Doesn't matter if I'm on XM or FM.
Any thoughts? Thanks for your time.

do u have a swi-ps if so that is the problem, i have installed a few that have done the same thing and the steering wheel control is bad, just try another

h2omaan said:

do u have a swi-ps if so that is the problem, i have installed a few that have done the same thing and the steering wheel control is bad, just try another

Now that you mention it, I had the problem a couple times with those. Instead of using the accy line provided by the various databus interfaces, I went to the igniton for power for the interface. Tied into the brown wire I think it was.