Quote:thanks, john
Some rumours and why they're false
GM's new wiring can be scary - ask a few installers who haven't worked on a 2000+ J-body, and you might hear one of the following rumours:
* Your oil light will stay on (nope, sorry)
* Your car will not start (go ahead, try it)
* The factory security system will no longer work (different module altogether)
* Your air bags will deploy (unless you wire into them, they won't)
* The oil life sensor system can't be reset without the factory head unit (option not even available on Cavaliers!)
* Your automatic transmission will no longer shift (not connected to the radio)
* RDS radios are wired differently (no they're not)
I'm sure there are more "bad rumours" out there, but those are the common ones I have heard of. Simply put, the only thing different between the Class 2 wiring and conventional pre-2000 wiring, is that the radio is always plugged in and now the BCM controls when it goes on and off. It's that simple. As far as the Class 2 wiring is concerned, the factory radio only receives data, it doesn't send any. So you can safely remove the factory deck and no real harm will occur.
There have been a few cases reported of air bags going off, however I can't seem to confirm ANY of them. The only real reason why the airbags would go off is if the air bag system had not been properly disabled, or if the wrong wires had been tapped for the install of the new deck.
If you take your car somewhere to get the radio replaced, and they tell you one of the above rumours, either tell them to get their facts straight or take your car somewhere else (I will work for beer!!). They obviously don't know what they're doing. And I honestly wouldn't recommend letting someone who has no idea touch YOUR car!
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!).