I have noticed some of the information requests could be solved by reading the Owners Manual. I also know that often these are lost and/or damaged over the years.
I have located a GM site where you can download many of these Owners Manuals in .pdf format.
It my be useful for those trying to understand the basic controls of their Cadillac.
These are large files(about 19-20mb). If you are interested I would suggest trying this link, find your model/year, then right-click and "Save Target As"; to your computer.
Cadillac Owners Manuals
-George