2012 GMC SIERRA DENALI Steering Problems

I HAVE GOODYEAR WRANGLER SR-A 265 60R20 TIRES ON MY SIERRA DENALI HD 2500. I WAS ON THE WAY BACK FROM NC VIA I-95 AND PULLED OVER SO MY WIFE COULD NURSE OUR 3 WEEK OLD. ME AND THE BOYS WENT IN K-MART FOR A FEW MINUTES. UPON RETURNING AND GETTING BACK ON THE ROAD, I NOTICED MY CAR WAS PULLING BAD RIGHT AND THE STEERING WHEEL WAS SHAKING VERY BADLY. I MANAGED TO DRIVE IT THE ADDITIONAL 30 MILES BACK HOME. WHEN I STARTED THE TRUCK THE NEXT MORNING, THE STEERING WHEEL SHAKE WAS TOO BAD TO CONTINUE ANYWHERE BUT THE DEALERSHIP. I DROVE TO THE DEALERSHIP AND THEY SAID THAT THE TIRES WOULD BE COVERED UNDER MY EXISTING "BUMPER TO BUMPER" WARRANTY AS THE DEALERSHIP NOTICED THAT THERE WAS A HUGE BULGE IN THE TIRE WHICH WAS CAUSING ALL OF THE COMMOTION. UPON FURTHER INSPECTION, IT WAS NOTED...

AFTER EXITING INTERSTATE LOST STEERING AND BRAKES BRIEFLY IN PARKING LOT. PUMPED BRAKE AND BOTH RETURNED AFTER A HISSING SOUND. RECURRED A FEW TIMES IN NEXT 6 MONTHS OR SO. THEN, IN THE FALL OF 2013, LOST STEERING AND BRAKES ON I-49/US71B HEADING SOUTH FROM JOPLIN, MISSOURI. YOU COULD PUMP THE BRAKES AND BRIEFLY REGAIN, BUT FOR THE MOST PART ALL STEERING AND BRAKES WERE OUT. TOOK TRUCK TO GMC DEALER WHERE PURCHASED NEW IN BENTONVILLE. DEALER CONFIRMED NO STEERING AND BRAKES AND DAMAGED BUMPER WHILE VEHICLE IN ITS POSSESSION BY BUMPING INTO PARKING LOT BARRIER. DEALER DIAGNOSED POWER STEERING PUMP PROBLEM AND INDICATED THAT BRAKES AND POWER STEERING ARE TIED TO SAME PUMP/SYSTEM. DEALER REPLACED PUMP BUT SAID THAT EVEN THOUGH IT WAS A TWO OR THREE PART SYSTEM COULD ONLY REPLACE THE PUMP. TRUCK CONTINUED TO HAVE PROBLEMS AND WAS TAKEN BACK TO DEALER FOLLOWING SIMILAR EPISODE WHERE...

2012 GMC DENALI. CONSUMER WRITES IN REGARDS TO VEHICLE STEERING PROBLEMS. *SMD THE CONSUMER NOTICED A VERY BAD PROBLEM WITH THE STEERING WHENEVER HE SLOWED DOWN TO TURN, HE WOULD LOOSE CONTROL OVER THE ABILITY TO TURN. THE WHEEL LOCKED DOWN WHEN HE APPLIED THE BRAKE AND TRIED TO TURN AT THE SAME TIME. HE WAS NOT ABLE TO TURN UNTIL HE PRESSED ON THE ACCELERATOR OR RELEASED THE BRAKE. THE DEALER SAID IT WAS CAUSED BY THE POWER BOOSTER TAKING ALL THE POWER TO THE BRAKES AND LEAVING VERY LITTLE TO THE STEERING. ALSO, THERE WAS A PROBLEM WITH THE BACK-UP SCREEN. THE PICTURE WAS EXTREMELY DARK, AND IT WAS HARD TO MAKE OUT THE IMAGES ON THE SCREEN. THE DEALER TRIED TO LIGHTEN THE SCREEN, BUT TO NO AVAIL.

LOSS OF STEERING CONTROL (THREE EPISODES) : 13 NOV 2012, WHILE EXITING NB I-95 ONTO EB ROUTE 214 IN LANDOVER, MD, MY STEERING WHEEL LOCKED. MY SPEED AT THE TIME WAS APPROXIMATELY 50 MPH. I WAS ABLE TO BRAKE RAPIDLY AS THE RAMP BEGAN TO STRAIGHTEN FROM IT'S SWEEPING RIGHT CURVE. THE LOCKED STEERING WAS FORCING ME ONTO THE RIGHT SHOULDER. LUCKILY I WAS ABLE TO STOP MY TRUCK ON THE RIGHT SHOULDER BEFORE THE LOCKED STEERING FORCED ME OFF THE HARD TOP. DURING THIS EVENT, THE TRUCKS ENGINE REMAINED RUNNING AND THE IGNITION KEY STAYED TURNED ON. ONCE I WAS SAFELY STOPPED ON THE RAMP'S SHOULDER, I MADE ATTEMPTS TO TURN THE STEERING WHEEL. WITH BOTH OF MY HANDS ON THE WHEEL AND WHILE EXERTING A LOT OF UPPER BODY STRENGTH, I WAS ABLE TO BRAKE THE STEERING WHEEL FREE. YES, I DROVE THE CAR HOME FROM THAT POINT,...