2011 Chevrolet Impala vehicle speed control problems

“After getting into my parked car and starting it, the Stabilitrak warning message came on my display. This is the 2nd tike that this occurred. The first time it occured, my mechanic diagnosed it as a failed throttle body, which I replaced myself, (easy removal/installation). Now, a couple of months later, it occurred again. After doing some online research, it seems as though the position sensor on the accelerator pedal may be at fault. A lot, if not most cars today have a "fly-by-wire" system which replaces cables and such with sensors and motors. So, the accelerator, (gas), pedal controls the movement of the butterfly valve on the throttle body by sending a signal to the motor. I'm going to replace that... about $140 or so. I saw a YouTube video and the removal/installation is fairly easy. A lot of people are having this issue; maybe a recall is needed?”

“Brake assist, traction control, stablitrack, and ABS lights continually coming on. When breaking while making a turn the breaks slip or give and then suddenly grab hold causing a grinding sound. Car wobbles while these lights are on causing a noticeable change in stability and control.”

“I WAS DRIVING MY CAR AND SUDDENLY IT FLASHED ACROSS THE SCREEN SERVICE STABILITRAK, THEN SERVICE TRACTION CONTROL SYSTEM, THEN REDUCED ENGINE SPEED. THIS CAUSED MY VEHICLE TO SLOW WAY DOWN OUT OF NO WHERE FROM 70 TO LESS THAN 30, AND MADE STEERING NEAR IMPOSSIBLE. I HAVE MY TWO CHILDREN I DROVE AROUND AND I'M AFRAID TO EVEN DRIVE BECAUSE IF THERE'S AN ACCIDENT WITH THEM IN THE CAR BECAUSE MY CARS SLOWING UNEXPECTEDLY SOMEONE WILL BE PAYING FOR THIS. THIS IS A HUGE SAFETY ISSUE AND I SEE ALL OVER IT IS AND IT NEEDS TO BE FIXED!”

“ON 1/29/16 MY CAR DIED AND TOWED TO DEALER WHERE I WAS TOLD I NEED A TRANSMISSION. THE CAR ONLY HAD 69000 6MONTHS AGO DASH BOARD LIGHTS LIT TRACTION CONTROL, REDUCED ENGINE POWER SERVICE STABILITRACK ABS.WHEN I WOULD STEP ON THE ACCELARETOR PEDAL IT WOULD MAKE A WINDING NOISE GO TO THE FLOOR AND POP BACK UP AGAIN. AS I WAS DRIVING DOWN THE HIGHWAY ALL OF A SUDDEN I HAD NO ACCELERATION CAR HAD DIED. L PULLED TO THE SIDE OF THE ROAD A FEW MINUTES LATER STARTED UP AGAIN THIS HAPPENED NUMEROUS TIMES I TOLD MY SON HE COULDN'T DRIVE THE CAR BECAUSE I FELT IT WAS UNSAFE. I CALLED THE GM THEY GAVE ME A COUPON TO HAVE THE A DIAGNOSTIC CHECK ON IT. IN SEPT I WENT TO THE DEALER AND HE SCANNED MY CAR FOR CODES I WAS TOLD I NEEDED A RIGHT FRONT HUB PART NUMBER 13582664, A RIGHT WHEEL SPEED SENSOR HARNESS, 10340314, ACCELERATOR PEDAL, 84018392, AND A VENT VALVE 2085252. I CAN'T BELIEVE A CAR DEALERS WOULD LET A PERSON LEAVE NOT INFORMING THE CUSTOMER WHAT A SAFETY ISSUE THIS IS. I DROVE THE CAR FOR A DAY BECAUSE I COULDN'T AFFORD TO FIX IT AND WAS TRYING TO COME UP WITH THE MONEY AGAIN THE CAR DIED ON ME AS I WENT TO ACCELERATE NOW THE CAR IS SITTING IN MY YARD DEAD AS A…”

“JANUARY 2019 WAS DRIVING ON A VERY CONGESTED INTERSTATE 95 AT THE POSTED SPEED LIMIT OF 65. A WARNING POPPED UP ON MY DASH BOARD.SERVICE STABIL TRAK ENGINE IN REDUCED POWER. IT WAS LIKE I LONGER CONTROLLED MY CAR. THE SPEED SUDDENLY DROPPED. I WENT FROM 65MPH TO MAYBE 30MPH. IT FELT LIKE MY BRAKES WERE BEING APPLIED . I BECAME SCARED AND ALMOST STARTED TO PANIC. BUT BECAUSE I WAS IN THE FAR RIGHT LANE I WAS ABLE TO PULL OFF THE INTERSTATE. I SAT THERE ON THE SIDE OF THE INTERSTATE WITH MY HEART RACING AND MY HANDS LOCKED ON THE STEERING WHEEL SO HARD THEY CRAMPED UP. I TURNED OFF MY CAR AND REMOVED THE KEYS FROM THE IGNITION. I THANKED GOD I WAS ALONE IN THAT CAR. I THANKED GOD THE CAR BEHIND ME WAS NOT TAILGATING ME. I WAITED FOR ABOUT 5 MINUTES AND THEN PUT THE KEY BACK IN THE IGNITION AND STARTED THE CAR UP. THE WARNING WAS GONE BUT THE SERVICE ENGINE LIGHT REMAINED ON. I WAS SCARED TO DEATH TO MERGE BACK ONTO THE INTERSTATE SO I PUT ON MY FLASHERS AND DROVE ON THE SHOULDER AT 20-30MPH UNTIL I GOT TO THE FIRST EXIT. I MADE IT HOME. I CALLED A CAR REPAIR COMPANY. THEY TOLD ME THE SENSOR MORE THAN LIKELY NEED TO BE RESET. THEY SUGGESTED I TAKE IT TO A CHEVY…”

“TAKATA THE PROBLEM THAT IS WRONG WITH MY CAR IS THE ENGINE POWER REDUCE IS ALWAYS COME ON AND WHEN I'M ON THE INTERSTATE OR HIGHWAY MY SPEED REDUCE AND MY CAR CAN SHUT OFF AT ANY TIME WHILE DRIVING AND IT CAN CAUSE A BAD WRECK. THE PROBLEM BEEN HAPPEN FOR A MINUTE NOW”