Did you have any problems getting your dealership to warranty the car? I know some dealerships are terrible about covering things of that nature.
Well, any dealership in my area. My boss had a 2004 Yukon and the local GM dealership told him if he ever took it off-roading that they may not be able to warranty anything if it broke, basically he couldnt use it in 4x4 mode.
I think that there are alot of dealerships that make it seem like they do not want you to use the performance aspect of your vehicle, well I hope your dealership is not one of those, and you get your Caddy back soon.