I know what you are going through. I have a GMC sierra with 80K on the odometer. At 40K the dash started to crack. Sorry sir its out of warranty we can not help you. Apparently thousands of Sierra s and silverado s from 07-13. Have had my same issue. I signed a petition a few years ago. GM is acting like Servpro "like it never happened". Toyota recalled many trucks for cracked dash assemblys, but GM is ignoring the problem. I do own one Chrysler , a 70 Cuda with a Hemi. That's right I said Hemi. Been putting the restoration until my Z was done. I will sign your petition, please sign my broken dash petition.
1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes. White standard interior. Restoration complete May 2018