gms is is a gm supplier discount for friends. gmid is for employees and family. the gms discount is much less than the gmid discount. but still hefty. the h3 i picked up earlier this month was with a gms certificate number given to me on edmunds.com by a gm employee who gets several a month and is gracious to offer them. btw, the dealer asks for his/her name and he/her get points with gm for helping gm sell a vehicle. make sure you credit him/her. while i leased my h3, the lease price in part was based on the gms discount, plus the $750 plus $250 off msrp. all in all the selling price was below invoice. dont ask me how much, just do it if you are buying, and or leasing.
