2005 Denali: Regarding suspension conversion kits, why do some manufactures include rear coil springs while some do not? just spoke to Arnott on the phone and they think I don't have rear coils, but I do. My wife has a 2002 Tahoe with Autoride and her's has rear factory coils as well. The Arnott conversion kit is labled " Air Spring to Coil Spring Conversion Kit". I think this is misleading because I don't really have Air Springs, I have Coils with air shocks that modify the ride height. the shocks don't carry the whole load. This situation is driving me crazy.