I have some minor work to do on my '08 DTS (including tire rotate). I do have access to a professional hydraulic lift. Can I lift the entire car from the jack points and if so do I need to disable any suspension features before unweighting the suspension (and how would I do that if needed?)? I heard some earlier DeVille's had problems if the vehicle was lifted with the wheels dangling.
There are 4 lift points on the unibody frame pads. NOT the slots in the fender weld joints. Use the correct GM service manual for your year and model - there are diagrams in there.
Lift at the wrong point and you collapse the fender/door rocker area.
Nothing wrong with unloading the suspension - done all the time - just check the electrical connectors to the struts and shocks (if installed) to make sure nothing pulled loose - same for the rear ELC height sensor control rods.