There is no standard procedure across Cadillac's dealership chain, and each dealer has its own system, and Cadillac (corporation) has almost no regulation or control over courtesy transportation program! Each dealer has its own version of courtesy transportation program. My dealer basically says no loaner whatsoever, take the shuttle, and the shuttle is shared with multiple people, and there is always some drunk, questionable person among them! "Standard of the World" my ass!
A few days ago I stopped by at my MB dealer to take a look at CLA AMG. Since I have been through this loaner car thing with Cadillac, I specifically asked about the loaner program. And they told me MB has a standard procedure, and the customer gets a loaner car when he dropes the car, and the loaner cars has to be a new MB with less than 10k miles on it. And then he showed me a series of 2013 and 2014 certified C250 for sale, and all of them had about 10k miles. They used to be loaner cars that are replaced by new ones now!
This inconsistency between the service provided by Cadillac's dealer chain really hurts the brand. There are good dealers out there, but there many bad ones as well. Cadillac really needs to do something about this!