And, thanks to "Corgidog1", we have another way to access dealers who do courtesy deliveries.
1). Google "courtesy delivery enrolled dealers"
2) Click on link for "courtesy delivery enrolled dealers-gm fleet"
3) This will generate an Excel spreadsheet, with dealer name, address, telephone number, and contact person. List will be by states, for those dealers as of 12/4/12 who are enrolled to do courtesy deliveries.
Note, as per above accurate comment by "mjw930," this list is a starting point, and many dealers, even on the list, will still turn you down.
I always make a personal visit when I ask, "selling" the concept, pointing out what, in addition to the PDI, you will be at that time, purchasing from them other things, such as LDO's (dealer StingRay accessories which they make a profit on the part, then another profit on the installation charges for those accessories), that you will take your car in to them for service, that you will be buying an "X" next year and you will come visit them regarding that new car purchase (if truthful), etc.