$140 as told by a employee over the phone . Here are the tire BRANDS and their discounts at G.M. ,
http://mycertifiedservicerebates.com/Default.aspx , click on START REBATE ONLINE for brand and the discount . The Bridgestone Ecopia 422 and Continental Pro Contact w/ Eco Plus get the $100 off ( $25 off a tire ) . Some G.M. parts centers will match the price if within 50 mile radius . May also have free mount and balance with new tire purchase . Bridgestone / Firestone centers have $70 off when applying for their card or using a current one . I think you're also entitled to another $70 from Bridgestone / Firestone making a savings of $140 ( $35 off per tire ) . 4 tires have to be purchsed for all discounts . Call G.M dealer and B.F. to make sure these apply to your area . Good luck .