I have a 2006 w/Harman Kardon system. The car is still great with low mileage but I'd like to upgrade the head unit. Does anyone have any experience with this? I ask because I did the same with my 2000 Lesabre and apparently some of the HVAC circuitry lives in the stereo and I lost the dual climate control. That wasn't a big deal (annoying but liveable) but I am concerned that GM has done the same on the Lucerne and I could lose something more substantial by swapping out the old-timey stereo.
Any thoughts?
Any thoughts?