NHTSA Complaint #10633743 — 2009 GMC ACADIA

I WAS DRIVING THE VEHICLE ON THE HIGHWAY WITH A STEADY ACCELERATION. I NOTICED THE CAR START TO SHAKE A LITTLE AND THE TACHOMETER FLUTTERING UNTIL IT APPEARED THE CAR DOWN SHIFTED. I TOOK THE VEHICLE TO THE DEALER WHERE THEY TEST DROVE THE VEHICLE AND FOUND NO PROBLEMS. THE NEXT WEEKEND A LONG TRIP THE VEHICLE WAS DOING THE SAME THING. I NOTICED IT MORE ON SLIGHT INCLINES WITH THE CRUISE CONTROL ON. AT ONE POINT MY BROTHER DRIVING BEHIND ME SAID HE SAID A PUFF OF BLACK SMOKE COME OUT OF THE EXHAUST PIPE. I NOTICED THE SERVICE ENGINE LIGHT WAS FLASHING AT TIMES. TOOK THE VEHICLE BACK TO THE DEALER WHERE THEY SAID THE VEHICLE HAD CODES P0300 AND P0303. THEY REPLACED THE #3 IGNITION COIL. SINCE THE VEHICLE WAS OUT OF WARRANTY, MY TOTAL BILLS WERE $623. I SHOULD NOT HAVE HAD TO REPLACE AN IGNITION COIL AT 60K MILES! *TR