A smart lessor negoatiates the price of the vehicle just like a purchase.
Unless you are getting something in very high demand, chances are Jay (or another dealer) will negotiate the cap. cost (lease term for sales price) to below that of the GM supplier cost.
The only usual way a supplier code helps is on a high demand vehicle, or, for example, a saturn (which sells at MSRP).
What vehicle do you want? Feel free to PM me with any questions.
If you know what you are doing, there are GREAT leases to be had on certain vehicles. Most people don't.
An advertized lease (tv or newspaper) can always be beat.....