THE DASH IS CRACKING ON MY 08 SIERRA THAT HAS 62K MILES IN SEVERAL PLACES CREATING VERY SHARP EDGES AND RAISED PLASTIC PARTS THAT CAN LEAD TO CUT HANDS WHEN CLEANING OR PIECES OF THE DASH TO BE DISLODGED DURING AIRBAG DEPLOYMENT. DEALER HAS ACKNOWLEDGED SEVERAL OTHER GM VEHICLES WITH SAME ISSUES. GM WILL NOT ASSIST IN REPAIRS.