i tow my truck with my 98 2wd tahoe. airbags would be nice but are not needed. its all about where you place the truck on the trailer. i tow with mine pretty far forward and the back of the tahoe barly sags.
the question isn't really about how a tahoe tows, its about the different tahoe rear suspension.
the thing i would think about is the fact that with coils your going to have ALOT of rubber bushings to wear and go out.