Autogenuity supports multiple brands, but you pay for brands separately or buy a bundle of them. It's windows software with a usb-odbii cable. At least for gm trucks, it supports accessing all the computers on the truck, as well as performing a various of diagnostic operations, but you'll have to either search through their web site or get ahold of them if you want to know what specifically they support doing with your particular vehicles.
2004 GMC Sierra 3500 C&C, added 4WD, 6.0L gas, Extended Cab, SLE, Transgo 4L80e-HD2 kit installed
Whee! Dually Club Member #1109