2009 GMC Envoy Steering Problems

TL* THE CONTACT OWNS A 2009 GMC ENVOY. THE CONTACT STATED THAT WHILE DRIVING AT 55 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS TOWED THE DEALER WHERE IT WAS DIAGNOSED THAT THE IGNITION SWITCH NEEDED TO BE REPLACED. IN ADDITION, THE DRIVER'S AIR BAG AND THE STEERING WHEEL FAILED DUE TO THE IGNITION SWITCH FAILURE. AS A RESULT, THE FRONTAL AIR BAG AND THE STEERING WHEEL POSITION SENOR WAS REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDE IN NHTSA CAMPAIGN NUMBER: 14V171000 (ELECTRICAL SYSTEM), NHTSA CAMPAIGN NUMBER: 14V153000 (STEERING), AND NHTSA CAMPAIGN NUMBER: 14V047000 (AIR BAGS, ELECTRICAL SYSTEM). THE FAILURE MILEAGE WAS 63,566 AND THE CURRENT MILEAGE WAS 87,000. UPDATED 9/4/14*CN UPDATED 12/16/2014 *JS

WHILE DRIVING AROUND TOWN, I HEAR A NOISE, THAT SOUNDED LIKE A FLAT. THE TRUCK BEGAN TO SLOW DOWN ON ITS OWN, WITHOUT ME APPLYING THE BREAKES. I MANAGED TO GET THE TRUCK OVER TO THE SIDE OF THE ROAD. THE SERVICE STABLTRK LIGHT WA ON, THE BRAKES LOCKED UP. I HAD IT TOWED TO THE DEALER WHO DID 1400 DOLLARS OF WORK ON IT , BUT STATED THE COULD NOT GET IT TO DUPLICATE MY COMPLAINT. 7 DAYS LATER IT REPEATED THE SAME THING, I HAD IT TOWED TO THE DEALER. THIS TIME THEY TOLD ME THAT I HAD CONTAMINATED BRAKE FLUID. I WAS UPSET, AND FELT I WAS BING JERKED AROUND. I HAD IT TOWED HOME. HAD ANOTHER MACHANIC TEST THE BRAKE FLUID, NEEDLESS TO SAY, IT SHOWED TO HAVE THE NORMAL AMOUNT OF CONTAMINATION FROM ROUTINE DRIVING. HE ALSO COULD NOT GET IT TO REPEAT THE PROBLEM, I AM ASSUMING NO CODES CAME UP THIS TIME EITHER. I HAVE DRIVIEN IT FOR ONE MONTH WITH OUT A PROBLEM, UNTILL THIS MORNING, I WENT TO THE STORE, ABOUT 1/2 MILE FROM MY HOME, AND THE SAME PROBLEM OCCURED. AFTER LEAVING THE ENGINE OFF FOR APPRO. 30 MIN, IT BECAME DRIVABLE AGAIN.