NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
26 reportsClear category filter90,000 miles · Jan 11, 2016
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. THE CONTACT STATED THAT OIL WAS LEAKING UNDERNEATH THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER. THE TECHNICIAN DIAGNOSED THAT THE VALVE COVER GASKET WAS LEAKING OIL ONTO THE MANIFOLD. AS A RESULT, THE VALVE COVER GASKET NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF T…
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TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. THE CONTACT STATED THAT OIL WAS LEAKING UNDERNEATH THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER. THE TECHNICIAN DIAGNOSED THAT THE VALVE COVER GASKET WAS LEAKING OIL ONTO THE MANIFOLD. AS A RESULT, THE VALVE COVER GASKET NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 90,000. UPDATED 04/08/16*LJ
NHTSA ODI #10819283
81,000 miles · Dec 31, 2015
Engine And Engine CoolingService Brakes
TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. WHILE DRIVING 30 MPH, THE CHECK ENGINE WARNING LIGHT ILLUMINATED AND THE VEHICLE JERKED SEVERELY. IN ADDITION, THE BRAKES WERE UNRESPONSIVE. THE CONTACT PULLED OVER TO RESTART THE VEHICLE, BUT THE FAILURE RECURRED. THE CONTACT MENTIONED RECONNECTING A VACUUM HOSE AFTER OBSERVING THAT…
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TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. WHILE DRIVING 30 MPH, THE CHECK ENGINE WARNING LIGHT ILLUMINATED AND THE VEHICLE JERKED SEVERELY. IN ADDITION, THE BRAKES WERE UNRESPONSIVE. THE CONTACT PULLED OVER TO RESTART THE VEHICLE, BUT THE FAILURE RECURRED. THE CONTACT MENTIONED RECONNECTING A VACUUM HOSE AFTER OBSERVING THAT IT WAS DISCONNECTED FROM THE POWER BOOSTER. AFTERWARDS, THE BRAKES BECAME RESPONSIVE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE THROTTLE POSITION SENSOR FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED, BUT THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO THE DEALER ONCE MORE WHERE IT WAS DIAGNOSED THAT THE CATALYTIC CONVERTER FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 81,000. UPDATED 03/04/16*LJ *TR
NHTSA ODI #10817206
142,760 miles · Mar 11, 2015
Engine And Engine CoolingPower Train
WHILE DRIVING MY CAR THE SPEED REDUCED ITSELF FROM 40MPH TO 5 MPH AND THE CHECK ENGINE LIGHT CAME ON ALONG WITH REDUCED ENGINE POWER ACROSS MY DASHBOARD. THE CAR STARTED SHAKING AND JERKING. IT THEN SHUT OFF WHILE I WAS DRIVING IT. I HAD IT TOWED THE NEXT DAY TO THE REPAIR SHOP AND THEY SAID A SENSOR WAS BAD IN THE GAS PEDAL AND…
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WHILE DRIVING MY CAR THE SPEED REDUCED ITSELF FROM 40MPH TO 5 MPH AND THE CHECK ENGINE LIGHT CAME ON ALONG WITH REDUCED ENGINE POWER ACROSS MY DASHBOARD. THE CAR STARTED SHAKING AND JERKING. IT THEN SHUT OFF WHILE I WAS DRIVING IT. I HAD IT TOWED THE NEXT DAY TO THE REPAIR SHOP AND THEY SAID A SENSOR WAS BAD IN THE GAS PEDAL AND REPLACED THE WHOLE PEDAL. 4 DAYS LATER IT DID THE SAME THING. AGAIN IT STARTED SHAKING AND JERKING THEN SHUT ITSELF OFF. I TOOK IT BACK TO THE REPAIR SHOP BUT BY THE TIME THEY COULD READ THE CODES THE CAR HAD BEEN SHUT OFF LONG ENOUGH THAT THEY COULDN'T FIND ANYTHING. THEY CLEANED THE THROTTLE BODY AND GAVE IT BACK. THE NEXT DAY IT DID THE SAME THING. I AGAIN TOOK IT BACK AND DID NOT SHUT IT OFF TIL THEY READ THE CODES. IT READ THE THROTTLE BODY WAS BAD. THEY REPLACED IT AND GAVE THE CAR BACK. 30 MILES LATER, IT STARTED ALL OVER AGAIN. I HAVE SPOKE TO GENERAL MOTORS AND THEY REFUSE TO DO ANYTHING ABOUT THIS ISSUE EVEN THOUGH THERE ARE SEVERAL FORUMS ON THE WEB WITH IMPALAS DATING BACK TO 2005 HAVING THIS SAME ISSUE. THIS IS GOING TO CAUSE AN ACCIDENT AND HURT/KILL PEOPLE IF ITS NOT ADDRESSED SOON. *TR
NHTSA ODI #10693444
Mileage unknown · Feb 9, 2015
Electrical SystemEngine And Engine CoolingPower Train
LETTER FROM CONSTITUENT WHO EXPERIENCED PROBLEMS WITH HER 2008 IMPALA, SEEKING REIMBURSEMENT FOR THE REPAIRS SHE BELIEVES WERE ALL PART OF A RECALL. *SMD THE CONSUMER STATED ON APRIL 1, 2014, SHE HAD JUST EXITED THE INTERSTATE HIGHWAY, WHEN SUDDENLY THE ENGINE SHUT OFF. THE VEHICLE WOULD NOT RE-START AND A MESSAGE APPEARED ON …
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LETTER FROM CONSTITUENT WHO EXPERIENCED PROBLEMS WITH HER 2008 IMPALA, SEEKING REIMBURSEMENT FOR THE REPAIRS SHE BELIEVES WERE ALL PART OF A RECALL. *SMD THE CONSUMER STATED ON APRIL 1, 2014, SHE HAD JUST EXITED THE INTERSTATE HIGHWAY, WHEN SUDDENLY THE ENGINE SHUT OFF. THE VEHICLE WOULD NOT RE-START AND A MESSAGE APPEARED ON THE DASH THAT READ THROTTLE CONTROL SYSTEM. THE VEHICLE WAS TOWED TO A SERVICE STATION. THE THROTTLE BODY WAS REPLACED. ON APRIL 19, 2014. THE CHECK ENGINE LIGHT ILLUMINATED AS SHE WAS DRIVING. SHE PULLED INTO A PARKING LOT, AND TURNED OFF THE ENGINE. THE VEHICLE DID NOT RE-START, ONCE AGAIN, THE VEHICLE HAD TO BE TOWED. THE POWER TRAIN CONTROL MODULE HAD TO BE REPLACED AND THE COMPUTER WAS RE-PROGRAMMED.*JB
NHTSA ODI #10682289
27,000 miles · Oct 6, 2014
Engine And Engine CoolingPower Train
TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. WHILE DRIVING APPROXIMATELY 35 MPH, THE ENGINE STALLED WITHOUT WARNING. THE VEHICLE WAS MERGED TO THE SIDE OF THE ROAD. UPON RESTARTING, THE VEHICLE WAS ABLE TO OPERATE NORMALLY. THE FAILURE OCCURRED FIVE TIMES. ON A SEPARATE OCCASION, THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC…
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TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. WHILE DRIVING APPROXIMATELY 35 MPH, THE ENGINE STALLED WITHOUT WARNING. THE VEHICLE WAS MERGED TO THE SIDE OF THE ROAD. UPON RESTARTING, THE VEHICLE WAS ABLE TO OPERATE NORMALLY. THE FAILURE OCCURRED FIVE TIMES. ON A SEPARATE OCCASION, THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE POWER CONTROL MODULE WAS REPLACED. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 27,000. UPDATED 11/20/14*LJ UPDATED 01/13/15
NHTSA ODI #10641739
78,000 miles · Sep 25, 2014
Engine And Engine CoolingSteeringSuspension
TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. WHILE DRIVING APPROXIMATELY 40 MPH, THE STEERING WHEEL SEIZED WITHOUT WARNING. THE FAILURE OCCURRED TWICE. THE VEHICLE WAS TOWED TO A DEALER AND THE TECHNICIAN STATED THAT THE RACK AND PINION, BOTH FRONT WHEEL BEARINGS, AND THE INTAKE MANIFOLD NEEDED TO BE REPLACED. THE VEHICLE WAS N…
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TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. WHILE DRIVING APPROXIMATELY 40 MPH, THE STEERING WHEEL SEIZED WITHOUT WARNING. THE FAILURE OCCURRED TWICE. THE VEHICLE WAS TOWED TO A DEALER AND THE TECHNICIAN STATED THAT THE RACK AND PINION, BOTH FRONT WHEEL BEARINGS, AND THE INTAKE MANIFOLD NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 78,000.
NHTSA ODI #10638971
89,000 miles · Aug 26, 2014
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE HAVING MAINTENANCE PERFORMED ON THE VEHICLE, THE TECHNICIAN MADE HER AWARE THAT THERE WAS A LEAK COMING FROM THE COOLING RESERVOIR AND GASKETS. AS A RESULT, THE SEALS ON THE MOTOR MOUNT AND A NEW COOLANT RESERVOIR WOULD NEED TO BE INSTALLED. THE MANUFACT…
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TL* THE CONTACT OWNS A 2008 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE HAVING MAINTENANCE PERFORMED ON THE VEHICLE, THE TECHNICIAN MADE HER AWARE THAT THERE WAS A LEAK COMING FROM THE COOLING RESERVOIR AND GASKETS. AS A RESULT, THE SEALS ON THE MOTOR MOUNT AND A NEW COOLANT RESERVOIR WOULD NEED TO BE INSTALLED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 89,000.
NHTSA ODI #10628572
65,000 miles · Jul 21, 2014
Electrical SystemEngine And Engine Cooling
TH ENGINE OF MY 2008 IMPALA COMPLETELY SHUT OFF ON TWO OCCASIONS APPROXIMATELY TWO YEARS AGO AFTER HITTING A RELATIVELY LARGE POT HOLE. IN THE FIRST INCIDENT, I WAS TRAVELING WEST BOUND ON SNELL ROAD (OAKLAND TOWNSHIP, MI) BETWEEN ORION AND ROCHESTER ROAD AND HIT A LARGE POT HOLE TRAVELING APPROXIMATELY 40 MILES PER HOUR AND THE…
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TH ENGINE OF MY 2008 IMPALA COMPLETELY SHUT OFF ON TWO OCCASIONS APPROXIMATELY TWO YEARS AGO AFTER HITTING A RELATIVELY LARGE POT HOLE. IN THE FIRST INCIDENT, I WAS TRAVELING WEST BOUND ON SNELL ROAD (OAKLAND TOWNSHIP, MI) BETWEEN ORION AND ROCHESTER ROAD AND HIT A LARGE POT HOLE TRAVELING APPROXIMATELY 40 MILES PER HOUR AND THE VEHICLE ENGINE AND ELECTRICAL SYSTEM COMPLETELY SHUT OFF. AS I RECALL, I STEERED THE VEHICLE (MANUALLY) TO THE SIDE OF THE ROAD, PUT THE VEHICLE IN PARK, AND RESTARTED THE ENGINE. NO OTHER CARS WERE COMING EITHER WAY. A SIMILAR INCIDENT HAPPENED APPROXIMATELY 3 MONTHS LATER AS I WAS HEADING EASTBOUND ON SNELL ROAD BETWEEN MT. VERNON AND ROCHESTER ROAD. WHEN THE GM IGNITION RECALLS STARTED, I DID NOT CORRELATE THESE INCIDENTS WITH THE RECALL. HOWEVER, WHEN I READ A NEWSPAPER ACCOUNT RECENTLY OF A GM EMPLOYEE EXPERIENCING THE SAME SITUATION WITH HER 2006 IMPALA, I REALIZED IT MUST HAVE BEEN AN IGNITION ISSUE AS WELL. I ASSUMED THE 2008 IMPALA WOULD BE RECALLED LIKE THE 2006 IMPALA BUT TO DATE, I THE 2008 IMPALA HAS NOT YET BEEN RECALLED. PLEASE CONTACT ME WITH ANY FURTHER QUESTIONS.
NHTSA ODI #10615472
133,287 miles · Jun 24, 2014
Engine And Engine CoolingSuspension
THE FOLLOWING HAS HAPPENED TWICE TO ME IN THE LAST 3 MONTHS. I WAS DRIVING ON THE FREEWAY 65-70MPH WHEN THE SERVICE TRACTION CONTROL/ENGINE POWER REDUCED LIGHTS CAME ON DASH. MY CAR THEN LOST ALL POWER ON THE FREEWAY AND MY SPEED WAS REDUCED TO UNDER 35MPH. AFTER STOPPING THE VEHICLE AND TURNING IT OFF FOR APPROXIMATELY 5 MINUTE…
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THE FOLLOWING HAS HAPPENED TWICE TO ME IN THE LAST 3 MONTHS. I WAS DRIVING ON THE FREEWAY 65-70MPH WHEN THE SERVICE TRACTION CONTROL/ENGINE POWER REDUCED LIGHTS CAME ON DASH. MY CAR THEN LOST ALL POWER ON THE FREEWAY AND MY SPEED WAS REDUCED TO UNDER 35MPH. AFTER STOPPING THE VEHICLE AND TURNING IT OFF FOR APPROXIMATELY 5 MINUTES, THE CAR STARTED BACK UP. *TR
NHTSA ODI #10605490
60,000 miles · May 9, 2014
Engine And Engine CoolingVehicle Speed Control
DRIVING DOWN HIGHWAY WHEN CHECK ENGINE LIGHT AND "ENGINE POWER REDUCED" APPEARED ON MY DASH. SOON AFTER MY SPEED AND POWER WAS CUT FROM 70 MPH TO UNDER 40. I GOT ANOTHER MESSAGE SAYING "SERVICE THROTTLE DISABLED" AND MY CAR LOST ALL ABILITY TO ACCELERATE AND STEER. I WAS FORCED TO PULL OVER AND WAITED UNTIL IT STARTED UP AGAIN. …
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DRIVING DOWN HIGHWAY WHEN CHECK ENGINE LIGHT AND "ENGINE POWER REDUCED" APPEARED ON MY DASH. SOON AFTER MY SPEED AND POWER WAS CUT FROM 70 MPH TO UNDER 40. I GOT ANOTHER MESSAGE SAYING "SERVICE THROTTLE DISABLED" AND MY CAR LOST ALL ABILITY TO ACCELERATE AND STEER. I WAS FORCED TO PULL OVER AND WAITED UNTIL IT STARTED UP AGAIN. THIS IS A DANGEROUS FLAW THAT IS HAPPENING TO MANY GM OWNERS. PLEASE RECALL FOR EVERYONE'S SAFETY. *TR
NHTSA ODI #10587458