Your issue will be the options, after about 30k options add 0 to the GMFV, that'll be what has you so upside down atm.
That and a low deposit will hurt you
Atop that you'll get a scumbag lowball offer as the stealer won't actually want your car right now, and when they do, they wanna flip the used cars for like 3-5k, since it could sit on the forecourt a while.