Yes, they do get reimbursed by GM. As I understand it though, participation may affect their allocation for certain models. Further, if the dealer participates, they are capped to charging no more than $75.00 for documentation fees. In States such as Florida, where dealers charge outrageous documentation and other fees, it decreases their profit margin. So in today's market, many dealers prefer to charge MSRP or higher, plus a few thousand for documentation fees, accessories, lifetime warranties and maintenance plans, etc., versus participating in GM's special programs.I wonder why though, Doesn't the dealer still get the GMX/GMS/Supplier Discount back from GM?