2011 GMC YUKON DENALI Electronic Stability Control Esc Problems

I WAS ON THE HIGHWAY DRIVING THROUGH BOSTON IN THE FAST LANE, GOING ABOUT 70MPH WHEN ALL OF A SUDDEN THE STABILITY CONTROL LIGHT CAME ON WITH THE CHECK ENGINE LIGHT AND THE ENGINE REDUCED POWER LIGHT AND MY VEHICLE TOTALLY LOST POWER TO THE GAS PEDAL. I WAS ABLE TO GET INTO THE SLOW LANE BUT MY VEHICLE WAS NOT ABLE TO GO FASTER THAN 35MPH AND THERE WAS HARDLY POWER TO MY GAS PEDAL. LUCKILY, I MADE IT TO AN OFF RAMP, AS I STARTED TO COME TO A STOP, THE ENGINE WAS RUNNING VERY ROUGH AND IT FELT LIKE IT WAS SHAKING THE VEHICLE BACK AND FORTH. I BARELY MADE IT INTO A EMPTY PARKING LOT AND SHUT THE ENGINE OFF. I MANAGED TO MAKE IT TO MY MECHANIC, WHO GOT A THROTTLE SENSOR CODE FROM THE ENGINE. HE TOLD ME ABOUT A SPECIAL COVERAGE ADJUSTMENT #12273B...