2015 GMC TERRAIN Steering Problems

IN 2 DAYS, THE VEHICLE HAS STALLED ON ME. I WAS IN THE PARKING LOT AND ANOTHER CAR ALMOST HIT ME SINCE THE CAR SLOWED DOWN AND THE STEERING WHEEL GOT HARD THEN SHUT OFF. TODAY, I ALMOST GOT HIT AGAIN AFTER STOPPING AT A STOP SIGN GOING INTO A TURN I ALMOST HIT SOMEONE AND A CAR ALMOST HIT ME.

WHILE MAKING A RIGHT TURN AT THE BOTTOM OF A FREEWAY OFFRAMP THE KEYS ON THE KEYRING ATTACHED TO THE KEY IN THE IGNITION GOT STUCK IN THE STEERING WHEEL. THIS BRIEFLY PREVENTED ME FROM EXITING THE TURN, AND THEN WHEN THE KEYS BROKE FREE THE CAR HAD TURNED ITSELF OFF!! I HAD NO POWER STEERING, NO POWER BREAKS AND NO HEADLIGHTS. I WAS ON A SLIGHT DOWNGRADE AND WAS ABLE TO COAST TO THE NEXT BLOCK WHERE I TURNED RIGHT OUT OF TRAFFIC BEFORE COMING TO A FULL STOP. I WAS THEN ABLE TO RESTART THE CAR AFTER PUTTING INTO NEUTRAL (OR PARK, DON'T REMEMBER). THE KEYCHAIN THAT GOT STUCK WAS FROM ENTERPRISE RENTAL AND HAD 2 KEY-FOBS ON IT PLUS A PLASTIC ID TAG ON A SMALL WIRE RING. THIS, COMBINED WITH THE POOR PLACEMENT OF THE IGNITION SWITCH, HAS RESULTED IN MY HITTING THE KEYS WITH MY...