2013 Chevrolet Tahoe Speed Control & Cruise Problems

One day I was driving normal and my engine light and two other lights came on. It dropped my speed under 30mph and I couldn't pass the gas. It said reduced engine power, service stabilitrak and service traction. I immediately took it to auto zone then placed it in the shop at the dealership. They had my truck for almost 2 months and finally said they fixed it. It ran ok for a month or so. I was so scared to drive because it does it randomly. Boom it happen again now im frustrated because what is the problem. Called shop they said bring it back they will have a new person look at it. They had it for a month again. Paid more money. Then boom a month later the same thing. So at this point im calling no one is answering they ignored me so I called the customer service on the truck to complain. I had to get rentals and everything with the same problem it is over a year later. No answer and nobody called back nothing. I parked my truck for months and yesterday June 24th the lights came on again. I have heard alot of my friends and family say they have a chevy vehicle and they did/do the same thing.

WHILE DRIVING VEHICLE CONTINUES TO DROP INTO REDUCED POWER MODE CAUSING A JARRING MOTION AS IT DROPS A SIGNIFICANT AMOUNT OF SPEED,ALMOST CAUSING MULTIPLE ACCIDENTS. THE CHECK ENGINE LIGHT COMES ON, TRACTION CONTROL TURNS OFF, STABILLITRACK TURNS OFF, AND ENGINE GOES INTO LIMP MODE AND STARTS SHAKING AND JARRING. THE SAME 2 CODES CONTINUE TO COME UP IN DIAGNOSIS. P2135 AND P2176. I HAVE TAKEN THE VEHICLE TO THREE MECHANICS 1 OF THEM BEING CHEVY ITS SELF. WITH NO SOLUTION FOUND. I HAVE HAD THE ACCELERATION PEDAL REPLACED, THE WIRING REPLACED, THE IGNITION SWITCH AND RELAY REPLACED HAD THE THROTTLE BODY CONNECTOR REPLACED, THE THROTTLE BODY AND GASKET REPLACED 3 TIMES. I HAVE DONE EVERYTHING RECOMMENDED BY ALL SHOPS INCLUDING CHEVY. PLEASE HELP AS THE TRUCK HAS BEEN IN THE SHOP MORE THEN IT HAS BEEN ON THE ROAD AND I HAVE ALMOST BEEN IN MULTIPLE ACCIDENTS AS THE TRUCK IS DIFFICULT TO CONTROL WHEN THE ISSUE HAPPENS.

2013 CHEVROLET TAHOE. REPRESENTATIVE FROM THE CITY WRITES IN REGARDS TO PROBLEMS WITH POLICE FLEET. *TGW THE CONSUMER STATED AFTER THE NEW ENGINE CALIBRATIONS WERE INSTALLED ON SEVEN VEHICLES, LESS THAN 24 HOURS LATER, THE PROBLEM CONTINUED, ALONG WITH ADDITIONAL ISSUES AND PROBLEMS THAT WERE NEVER EXPERIENCED BEFORE. SPECIFICALLY, THE VEHICLES LUNGED FORWARD AGGRESSIVELY AFTER COMING TO A STOP. GM EVENTUALLY REMOVED THE CALIBRATIONS. THE ISSUE WITH THE VEHICLES STALLING, LACK OF POWER, IDLE SURGING AND HESITATION UPON ACCELERATION, CONTINUED. *JB

WHILE DRIVING THE SPEEDOMETER IS SHOWING 0 ON BOTH THE DIGITAL DISPLAY AND ANALOG NEEDLE DISPLAY. ALSO IT IS SHOWING THAT THE VEHICLE IS IN PARK. ONLY BY PULLING OVER AND STARTING THE CAR UP AGAIN (~5 MINUTES), THE PROBLEM GOES AWAY.