TRAVEL US HWY WHEN ENCOUNTERING RAIN CONDITION VEHICLE HAD REAR WHEEL LOSS OF CONTROL INTO HYDROPLANE, WHEN ATTEMPTING TO CORRECT STEERING INTO SKID THE STEERING FAILED TO RESPOND AS IF NO POWER STEERING. THE VEHICLE CRUISE CONTROL WAS ON UNTIL POINT OF FIRST APPLYING BRAKE. THE VEHICLE IMPACTED RAVINE AT FRONTAL IMPACTOF GRILL ATB HIGH SPEED THEN FLIP SIDE OVER SIDE WITHOUT ONE AIR BAG DEPLOYING. DRIVER,PASSENGER SIDE, PASSENGER/DRIVER-SIDE OF SEAT, OR PILLAR POST AIR BAGS FAILED. THE YELLOW AIRBAG INDICATOR LIGHT WAS ALWAYS ON AND BELIEVED TO BE NORMAL. AFTER PRESSING ON-STAR , EMERGENCY CONNECTION FAILED TO WHICH ON-STAR CLAIMS ANTENNA MUST OF BEEN DAMAGED, THOUGH PHOTOS SHOW INTACT. ON STAR COMPLAINT ABOUT FAILURE OF SYSTEM BEEN ON GOING SINCE PURCHASE. COMPLAINT WITH FTC, STATE OF MICHIGAN SOS (SECRETARY OF STATE) AND DEALERSHIP SHORTLY AFTER PURCHASE DEC 24 2014 SAFETY ISSUES TO INCLUDE: FRAYED SEAT BEL,T POWER STEERING SLOPPY AND NOISE, REAR SUSPENSION. DEALER AGREED TO ONLY ADDRESS SEAT BELT, AND REPLACE REAR CONTROL BUSHING ARM ON ONE SIDE. SUFFERED SEVERE NECK, SPINE COMPRESSION FRACTURES, HEAD, KNEE, ANKLE, TWISTED INTESTINE FROM SEAT BELT, LACERATION TO TORSO AND OTHER INJURIES REQUIRING HOSPITALIZATION. GM CONTACT AND OPENED COMPLAINT FILE FOR VEHICLE FAILURES