What 505 owners told NHTSA about the 2011 Chevrolet Impala

TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. WHILE DRIVING 70 MPH, THE VEHICLE DECELERATED INDEPENDENTLY. THE DEALER WAS UNABLE TO DIAGNOSE THE CAUSE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED AND THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE WAS 89,000.

NHTSA ODI 10608068

TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. THE CONTACT STATED THAT THE VEHICLE MADE A LOUD NOISE FROM THE ENGINE COMPARTMENT AND THE TRANSMISSION BEGAN SLIPPING. THE CONTACT MENTIONED THAT THE VEHICLE ALSO STALLED. THE CONTACT WAS ABLE TO RESTART THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 100,000.

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CRANKED UP THE CAR TO GO HOME. STABILITY LIGHT AND "ENGINE" LIGHT WAS ON. WHILE ON THE INTERSTATE PASSING A TRUCK THE ENGINE DIED. DISPLAY CENTER INDICATED SERVICE STABILITY TRACK AND REDUCED ENGINE POWER. COASTED OVER TO RT. SHOULDER. CAR WOULD NOT RESTART FOR ABOUT 30 SEC. CRANKED IT UP AND MADE IT HOME. TROUBLE CODE IS P2138 WHICH SEEMS TO INDICATE THE THROTTLE POSITION SENSOR D/E VOLTAGE. WILL TAKE TO DEALER IN AM. *TR

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WHEN SLOWING TO MAKE TURN "TRACTION" WARNING LIGHT FLASHES VEHICLE DOES NOT WANT TO ACCELERATE WHEN PRESSING GAS PEDAL AND THEN JUST TAKES OFF SUDDENLY. *TR

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I STARTED MY CAR AFTER A COLD NIGHT AND IMMEDIATELY GOT A "SERVICE STABILITRAK", "ENGINE POWER REDUCED", AND "SERVICE TRANCE ION CONTROL" MESSAGES. THE CAR HAD AN EXTREMELY ROUGH IDLE AND THEN WOULD NOT ACCELERATE TO MORE THAN 25 MPH. I RETURNED HOME AND MADE AN APPOINTMENT AT THE DEALERSHIP. LATER, I WAS READY TO TAKE THE CAR INTO THE DEALER AND IT STARTED FINE WITH NO ERROR MESSAGES OR CHECK ENGINE LIGHT. I CALLED THE DEALER AND THEY SAID IT MUST HAVE BEEN A COMPUTER ERROR THAT FIXED ITSELF. WELL, IT'S A WEEK LATER NOW AND I AM HAVING THE ISSUES AGAIN EXCEPT RESTARTING THE ENGINE DOES NOT FIX IT ANYMORE. THIS IS A SERIOUS ISSUE AND NEEDS TO BE RESOLVED BY GM AND NOT COST THE MANY PEOPLE EXPERIENCING THIS ISSUE HUNDREDS OF DOLLARS TO FIX! *TR

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WHILE DRIVING DOWN THE ROAD, THE CAR WILL VIOLENTLY JERK, AND THE DASHBOARD WILL FLASH, REDUCED ENGINE POWER. NOW CAR WON'T MOVE AT ALL. WE HAVE REPLACED THE GAS PEDAL TWICE! CHEVROLET NEEDS TO ADDRESS THIS ISSUE. I AM SEEING IT ALL OVER THE INTERNET. *TR

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THIS IS THE SECOND TIME THIS HAS HAPPENED. LESS THAN A YEAR AGO, WE RECEIVED A SERVICE STABILITRAC/SERVICE TRACTION CONTROL/ENGINE AT REDUCED POWER MESSAGE AND SPEED DROPPED FROM 40 MPH TO 5 MPH. WE BROUGHT IT TO THE CHEVROLET DEALER AND A TRACTION POSITION CONTROL SENSOR WAS REPLACED. TODAY, ON 11/24/13, WE WERE DRIVING 15 MPH IN A PARKING LOT AND RECEIVED THE SAME MESSAGE RESULTING IN THE SAME PROBLEM. THIS IS A SAFETY ISSUE DUE TO THE FACT THAT THE VEHICLE ESSENTIALLY STALLS OUT WITH LITTLE TO NO POWER AND NEARLY CAUSED A COLLISION AT AN INTERSECTION. WHEN WILL NHTSA FORCE GM TO RECALL AND FIX THIS ISSUE? THIS IS EXTREMELY DANGEROUS. *TR

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WHILE TRAVELLING ON THE HIGHWAY, IN THE RAIN, THE POWER TO THE ENGINE SUDDENLY AND DRASTICALLY SLOWED DOWN. THE WARNINGS SHOWED UP ON THE SCREEN" STABILITRAK, TRACTION CONTROL, ENGINE POWER LOSS. *TR

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WHEN DRIVING, NOTICED ON THE FREEWAY, IT WASN'T SMOOTH AT TIMES. THE TRANSMISSION'S SHIFTING WAS PRETTY ROUGH. NO INDICATION OF ANY ISSUES POPPED UP ON DASHBOARD. WHEN ARRIVING AT A FREEWAY RAMP, IT FELT LIKE I WAS HYDROPLANING, BUT ON GRAVEL. THEN, NOTICED WHEN PRESSING THE ACCELERATOR, WAS NOT GOING ANYWHERE, BUT FELT LIKE I WAS IN NEUTRAL. WAS ABLE TO PULL OVER AND TAKE A LOOK... TRANSMISSION FLUID WAS FINE... NOTHING POPPED UP ON THE DASHBOARD. NOTHING! THE INDICATORS FOR TIRES, OIL, ETC WERE SHOWING INFO, BUT NOTHING TO INDICATE IT HAD DIED OR IF THERE WERE ANY ENGINE ISSUES. HAD BROUGHT IT TO THE DEALERSHIP WHERE I HAD BOUGHT THE CAR 11 MONTHS AGO. THE MECHANICS WERE SAYING THAT THEY HAVE NEVER SEEN SUCH AN HUGE TRANSMISSION FAILURE BEFORE. THEY WOULD HAVE TO REPLACE THE WHOLE THING. *TR

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STARTING FROM STOPPED POSITION, TRANSMISSION SLIPS WHEN PRESSING GAS PEDAL. NO ERROR CODES. ALSO WHEN COMING TO A COMPLETE STOP, AFTER STOPPING, THE VEHICLE JERKS, LIKE IT IS GOING FROM NEUTRAL INTO FIRST GEAR. *TR

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MY 2011 IMPALA IS READING "SERVICE THROTTLE. REDUCE ENGINE POWER" AND THEN PROCEEDS TO SHUT DOWN. EVEN AFTER REPLACING ACCELERATOR PEDAL POSITION SENSOR, VEHICLE IS STILL READING SAME ERRORS. THIS IS VERY DANGEROUS BECAUSE THERE IS NO LIMITATIONS TO WHEN THE VEHICLE SHUTS OFF. AFTER EXTENSIVE RESEARCH, A LOT OF PEOPLE ARE HAVING THE EXACT SAME ISSUE AND CHEVROLET HASN'T ATTEMPTED TO DO ANYTHING ABOUT IT. PLEASE HELP! *TR

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TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 65 MPH ALL THE WARNING LIGHTS ILLUMINATED AND INDICATED THAT THE ENGINE WAS LOOSING POWER. THE CONTACT PULLED OVER AND WAITED A FEW MINUTES BEFORE RESTARTING THE VEHICLE. THE VEHICLE WAS LATER TAKEN TO A DEALER WHO DIAGNOSE THAT THE APP SENSOR AND MODULATOR FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED FOR BOTH COMPONENTS. APPROXIMATELY 1 MONTH LATER THE CONTACT WAS DRIVING APPROXIMATELY 65 MPH AND THE VEHICLE STARTED TO SLOW DOWN WHILE HE WAS PRESSING ON THE ACCELERATOR PEDAL. AFTER PULLING OVER THE VEHICLE WAS UNABLE TO ACCELERATE BUT THE RPM'S WERE RISING. THE VEHICLE WAS TOWED TO THE DEALER DIAGNOSED THAT THE TRANSMISSION FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND THEY OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS APPROXIMATELY 51,000 AND THE CURRENT MILEAGE WAS APPROXIMATELY 52,000. THE VIN WAS UNAVAILABLE.

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TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. THE CONTACT STATED THE VEHICLE WOULD SURGE AFTER IT SHIFTED INTO GEAR . THE VEHICLE WAS TAKEN TO THE DEALER WHO WAS UNABLE TO DUPLICATE THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE BUT DID NOT OFFER ANY ASSISTANCE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 500 AND THE CURRENT MILEAGE WAS 1,185.

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TL*THE CONTACT OWNS A 2011 CHEVROLET IMPALA. THE CONTACT NOTICED THAT THE GEAR SHIFT SELECTOR WOULD HESITATE WHEN INDICATING WHICH GEAR THE VEHICLE WAS IN. THE DEALER ADVISED THE CONTACT THAT THE VEHICLE WAS OPERATING AS DESIGNED. THE MANUFACTURER WAS NOTIFIED AND THE CONTACT WAS AWAITING A RESPONSE. THE VEHICLE WAS NOT REPAIRED. THE CURRENT MILEAGE WAS 1,500 AND THE FAILURE MILEAGE WAS APPROXIMATELY 5.

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