Help me hack a 2017 buick enclave

I am currently on a lease, a 2015 Rouge sv for 390 a month with 10 months remaining. I saw this buick enclave 2017 msrp 50k lowered to 40k. Question is can I still bargain the discounted price and to what extent? I know they bringing in the all new enclave this fall so they are really trying to rid of the 2017 and in your opinion how much will be the lease price that I should ask them. Need your help guys because the last lease I got I think they screwed me. Thanks

For purchase, GM is offering 15% off Enclave Leather model, so most of that discount is attributed to that. Check Buick.com and find the particular Enclave you want and see what the purchase offers are and subtract that from the discount.

Thanks so you saying that the 15% percent off does not include the dealer discount and rebates? And also my uncle is a retired GM engineer(just knew it lol) does his employee discount helps too?