The real problems
As far as real 'problems' go, there are TWO actual,
guaranteed-to-happen 'side effects' to replacing the
factory radio, no matter which deck you have (RDS or not!).
1. There is no
+12V switched wire in the factory radio wiring harness to
use to turn your new deck on and off.
Why? Because GM switched to
Class 2 circuitry to
turn the radio on and off, and to leave it on for 10
minutes until you open the driver's side door (you know
what I'm talking about, right?) and do 'chime' the driver's
speaker when some warning is going off.
There IS a constant +12V wire, as the factory deck always
has power to save your presets and such. Either you or your
installer will have to find a spot to tap into a switched
ignition wire.
2. If you
remove the factory deck, you lose the 'chimes' that tell
you the lights are still on, or your key is in the
ignition, or you're driving with the emergency brake on,
etc, etc, etc.
No more chimes, ever. Which I think is not necessarily a
bad thing... =)
Why? The factory radio uses
Class 2 signals to
'chime' the driver's door speaker. If you remove it, you
lose the chimes. There isn't a separate GM chime module
available either, so your only alternative is to
relocate the factory deck, if you want
to keep the chimes. If you don't like the chimes, then this
is a no-brainer!