2018 Buick Enclave Owner Complaints

ON ONLY THE THIRD DAY AFTER PURCHASING A BUICK ENCLAVE AVENIR 2018 I HAD A SAFETY ISSUE INVOLVING THE BRAKES. WHEN APPLYING THE BRAKES A GRINDING NOISE WITH AN INABILITY TO PROPERLY BRAKE AND A RED SERVICE BRAKE ASSIST MESSAGE APPEARED ON MY DASH. THIS HAS HAPPENED FROM A COLD START AS WELL AS AFTER BEING IN MOTION AT LEAST 20 MINUTES CITY DRIVING. MY CAR HAS SINCE BEEN IN THE DEALER ON 4 OCCASIONS REPLACED THREE PARTS AND IS STILL CURRENTLY AT THE DEALERS. THE DEALER HAS HAD MY VEHICLE LONGER THAN I HAVE ALMOST 40 DAYS NOW WITH NO INFORMATION ON WHEN I WILL HAVE IT BACK AND I HAVE ONLLY OWNED MY VEHICLE FOR TWO MONTHS.

2/12/2018

I WAS DRIVING THE CAR AND WHEN I DEPRESSED THE BRAKES THE BRAKES DID NOT ENGAGE. THE DASHBOARD ILLUMINATED WITH A "BRAKE ASSIST: ALERT AND I COULD FEEL THE ABS BRAKES ENGAGE. LUCKILY THIS HAPPENED WHILE I WAS PULLING INTO A PARKING LOT. ONLY HAD 1,200 MILES. HAD VEHICLE TOWED TO DEALER. CHECK ENGINE LIGHT DID COME ON AND SHOWED CODE P0557. THEY REPLACED THE CRANK SHAFT POSITION SENSOR WIRING HARNESS AND 2 GASKETS, BASED ON A REPAIR BULLETIN AND THEN BEFORE I COULD GET THE VEHICLE HOME IT HAPPENED AGAIN. NO BRAKES, BUT BRAKE ASSIST ACTIVATED AND ABS WAS ABLE TO STOP THE VEHICLE. CHECK ENGINE LIGHT CAME ON AGAIN AND SHOWED CODES P0557, U0401, U0121, & U0078. HAD VEHICLE TOWED TO DEALER AGAIN. THIS TIME THEY REPLACED PART # 84341899. LUCKILY BOTH INSTANCES HAPPENED AT LOW SPEEDS AND I WAS ABLE TO SAFETY MANEUVER THE VEHICLE TO A PLACE WHERE I COULD GET TOWED AND NOBODY WAS IN FRONT OF ME.

7/7/2018

TL* THE CONTACT OWNS A 2018 BUICK ENCLAVE. WHILE THE VEHICLE WAS AT A STOP, IT STALLED AND HESITATED TO MOVE. THE CONTACT STATED THAT THE AUTOMATIC STOP FEATURE ON THE VEHICLE CAUSED THE FAILURE. THE VEHICLE WAS TAKEN TO CANNON CHEVROLET BUICK CADILLAC (100 N THACKER LOOP, OXFORD, MS 38655, (662) 550-4208) WHERE THE CONTACT WAS INFORMED THAT THE VEHICLE WAS BUILT WITH THE AUTOMATIC STOP FEATURE AND THERE WAS NO REMEDY TO REPAIR THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT THERE WAS NO REMEDY. THE FAILURE MILEAGE WAS APPROXIMATELY 3,500. CONSUMER STATED THE ENGINE AUTO STOP FEATURE CAUSES ENGINE TO GO DEAD EVERY TIME I COME TO COMPLETE STOP. ENGINE STARTS AFTER BREAK IS RELEASED. ON 9/22/18 ENGINE STOPPED WHILE CROSSING A 4 LANE HIGHWAY. UPDATED 10/26/18*JP

9/4/2018

2018 BUICK ENCLAVE. CONSUMER WRITES IN REGARD TO ENGINE SHUTING DOWN WHEN VEHICLE STOPS. *AS THE CONSUMER STATED THE START STOP FEATURE INTERMITTENTLY SHUTS DOWN THE ENGINE WHEN THE VEHICLE IS IDLE AND DOES NOT RECOVER QUICK ENOUGH FOR SAFE STARTS IN TRAFFIC. *JS

10/18/2018

TL* THE CONTACT OWNS A 2018 BUICK ENCLAVE. THE CONTACT STATED THAT WHEN THE VEHICLE WAS IN REVERSE, THE VEHICLE ROLLED FORWARD WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE SUSS BUICK GMC DEALER (866-608-5251, 1301 S HAVANA ST, AURORA, CO 80012) WHERE THE TECHNICIAN TEST DROVE THE VEHICLE AND STATED THAT THE VEHICLE PERFORMED AS DESIGNED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND REFERRED THE CONTACT TO NHTSA. THE FAILURE MILEAGE WAS ABOUT 200.

3/27/2018

I PURCHASED A NEW 2018 ENCLAVE IN SEPTEMBER OF 2018. I RECEIVED A RECALL LETTER FOR THE VEHICLE SOMETIME DURING THE SPRING 2019 SO I WENT TO MY DEALER SERVICE DEPARTMENT TO GET IT CHECK AND I WAS TOLD EVERYTHING WAS FINE. THEN IN SEPTEMBER I NOTICED THE CHECK ENGINE LIGHT CAME ON AND THE VEHICLE WOULD NOT ACCELERATE PROPERLY SO I TOOK IT TO THE DEALER SERVICE DEPT. ASAP. THEY TOLD ME THERE WAS AN ISSUE WITH THE TRANSMISSION. THEY SAID THAT BECAUSE I HAD LESS THAN 5,000 MILES THIS ISSUE SHOULD NOT BE OCCURRING. IT'S BEEN 4 MONTHS AND I HAVE NOT RECEIVED A REASONABLE TIME FRAME FOR WHEN MY VEHICLE WILL BE READY. MY RIGHTS AS A CONSUMER HAVE BEEN VIOLATED BECAUSE I RECEIVED A DEFECTIVE VEHICLE, WHICH PUT MY FAMILY AND I AT RISK. THE SAME DEALERSHIP OFFERED TO GIVE ME A LOANER VEHICLE THAT ENDED UP BEING DEFECTIVE AS WELL. THIS DEALERSHIP IS SELLING DEFECTIVE VEHICLES. THEY HAVE TOLD ME THAT ABOUT 50 OTHER PEOPLE ARE GOING THROUGH THE SAME ISSUE AND THE ONLY I CAN DO IS BE PATIENT, BUT DURING THE TIME I HAVE INCURRED MANY DAMAGES AND INCONVENIENCE AND THIS DEANSHIP ALONG WITH GM HAVE NOT GIVEN ME ANY SORT OF RESOLUTION FOR THE PAST 4 MONTHS.

12/17/2019

I WAS STOPPED AT AN INTERSECTION AT A TRAFFIC LIGHT & WHEN THE LIGHT TURNED GREEN, I TURNED LEFT & I'M UNCERTAIN IF MY EMERGENCY BRAKES KICKED ON OR IF MY CAR SIMPLY STALLED OUT, BUT MY CAR SUDDENLY WOULD NOT MOVE. MY PURSE, IN THE PASSENGER SEAT FLEW FORWARD & HIT THE FLOOR OF THE VEHICLE. THE CAR BEHIND ME AT THE LIGHT NEARLY REAR ENDED ME, BUT FORTUNATELY DID NOT. WE BROUGHT THE VEHICLE TO JIM ELLIS BUICK TO BE SERVICED, BUT THEY SAID IT APPEARED FINE & WAS CONFUSED. I DEFINITELY WAS NOT IN ANY DANGER OF HITTING ANYTHING WHEN TURNING AT THE INTERSECTION. THIS INCIDENT HAS MADE ME UNEASY WHEN OPERATING MY CAR.

10/1/2018

The car has an auto-stop feature however at times, when the car is stopped, the entire electrical and engine shuts down even while the car is in drive. The driver must restart the car and put the car into park and then back into drive. When the car restarts, several lights/messages turn on including "Service Transmission" and the "Service Parking Brake" message and parking break light. This is a safety and hazard issue as it has happened while in traffic on the freeway when at a standstill.

11/18/2021

PREMIUM PACKAGE COMES WITH SAFETY ALERTS. HOWEVER THREE OF THE ALERTS DO NOT PROVIDE ANY OF THE SAFETY FUNCTION DESCRIBED. FRONT COLLISION ALERT - HAVE HAD THREE EMERGENCY BRAKING SITUATIONS AND IN ALL THREE WHERE THE RED BEEPING ALERT IN THE DASH DID NOT FUNCTION. TESTED BY GM ENGINEER AND HE COULD NOT MAKE IT WORK AT OVER 20 MPH. ICONS IN INSTRUMENTION LIGHT UP SO IT IS SEEING CARS BUT NO WARNING AT STATED. FRONT PEDESTRIAN ALERT - SIMILAR TO ABOVE, CAR IS SEEING PEDESTRIAN BECAUSE ICONS LIGHT UP GREEN AND AMBER BUT FLASHING RED AND BEEPING DO NOT OCCUR WHEN YOU GET IN DANGER ZONE LANE DEPARTURE WARNING - THERE IS NOT BEEPING WHEN YOU CROSS A LANE WITHOUT USING TURN SIGNAL. LAND ADJUSTMENT WORKS SO VEHICLE IS SEEING LINES BUT IF YOU CROSS THE LINE WITHOUT ANY MANUAL EFFORT THE ALERT DOES NOT WORK A GM ENGINEER FOR THE HOUSTON AREA DROVE THE CAR AND COULD NOT GET ANY OF THESE FUNCTIONS TO WORK. HE CALLED GM AND WAS TOLD NOT TO TEST THIS THE FRONT COLLISION IN THE FIELD BUT THAT IT WAS TESTED AT FACTORY AND WORKED AS DESIGNED. SO GM SAYS THERE IS NOT ISSUE EVEN THOUGH I HAVE HAD 4 SITUATIONS WHERE IT SHOULD HAVE WORKED AND THE GM ENGINEER COULD NOT GET ANY OF THEM TO WORK AS OTHER GM CARS. OTHER ENCLAVES ON THE LOT ALL HAVE THE SAME ISSUE, SO IT IS EITHER A DESIGN FLAW OR A PROGRAMMING ISSUE, IN ANY EVENT IT IS A SAFETY FEATURE THAT IS NOT WORKING AS DESCRIBED OR AS IN OTHER GM CARS I OWN. THEY ARE NOT WILLING TO DISCUSS IT ANYMORE BECAUSE EVEN THOUGH IT DOES NOT WORK IN THE FIELD FOR HIM OR ME, THEIR ENGINEER SAID IT IS WORKING AS DESIGNED.

8/14/2018

I WAS STOPPED AT AN INTERSECTION AT A TRAFFIC LIGHT & WHEN THE LIGHT TURNED GREEN, I TURNED LEFT & I'M UNCERTAIN IF MY EMERGENCY BRAKES KICKED ON OR IF MY CAR SIMPLY STALLED OUT, BUT MY CAR SUDDENLY WOULD NOT MOVE. MY PURSE, IN THE PASSENGER SEAT FLEW FORWARD & HIT THE FLOOR OF THE VEHICLE. THE CAR BEHIND ME AT THE LIGHT NEARLY REAR ENDED ME, BUT FORTUNATELY DID NOT. WE BROUGHT THE VEHICLE TO JIM ELLIS BUICK TO BE SERVICED, BUT THEY SAID IT APPEARED FINE & WAS CONFUSED. I DEFINITELY WAS NOT IN ANY DANGER OF HITTING ANYTHING WHEN TURNING AT THE INTERSECTION. THIS INCIDENT HAS MADE ME UNEASY WHEN OPERATING MY CAR.

10/1/2018

BUICK NOT A YEAR OLD, IN OUR GARAGE VERY STRONG ODOR OF GASOLINE CANNOT LET IT INSIDE THE GARAGE IT SMELLS STRONG GOING INTO HOUSE ATTACHED TO GARAGE!

11/4/2019

mY VEHICLE STOPPED IN THE MIDDLE OF THE HIGHWAY AND WAS UNABLE TO PUT IN DRIVE

1/29/2025

Passenger side rear electronic parking brake wire clip failed, wire is rubbing against the rear cv boot. This caused a short that led to defective ABS control module that had to be replaced for anti-skid and anti-roll for this SUV. It also affected the transmission alert system. Related Bulletins: https://s3.amazonaws.com/shop-ware-prod-attachments/2ce2615fbf6158c020eb7ddbba19c956d5c9cf33.pdf?1678982217 https://s3.amazonaws.com/shop-ware-prod-attachments/df15af6513bb2265bc07179efd733f06e355fe8a.pdf?1678916531 From Shop: "Continued working with the electronic parking brake system Used GM Techline connect to attempt to reprogram the EBCM because of the programming error DTC. After programming we also performed the module configuration procedure and although e removed the programming error, the system is still reporting a failure with the LEFT parking brake circuit. All circuits have been checked. The current hypothesis is that the electronic brake control module (EBCM) has failed internally. This likely occurred when the actuator wiring became exposed and allowed the wiring to short together. : https://s3.amazonaws.com/shop-ware-prod-attachments/d0edde862ec36d33b013087e9934f74892154a13.pdf?1678995379

4/25/2023

Was driving at 35 MPH with no other cars or obstructions in front of me and the vehicle suddenly slammed on the brakes on its own and the throttle became inactive (would not respond to inputs). I don't know if the vehicle slammed on the parking brake or the service brakes. After 30 or so seconds everything returned to normal. No lights are illuminated on the dash, but a light did come on when the vehicle braked on its own. The light turned off before I could see what it was.

8/5/2023

I WAS DRIVING ON A HIGHWAY 6 IN WATERLOO INDIANA AND MY SUNROOF EXPLODED AND THE ENTIRE GLASS WAS SHATTERED AND HAD A HUGE HOLE. THE EXPLOSION WAS LIKE A SHORT GUN GOING OFF. I THOUGHT SOME ONE SHOT OR THREW SOMETHING BUT THERE WAS NO OVERPASS. I CALLED THE POLICE JUST TO MAKE SURE AND A REPORT WAS FILED

8/19/2018

8am, Stopped at intersection. Light traffic. Green light, increased speed to 15 mph, turning left and sunroof explodes. Luckily inside shade cover was closed so no glass was able to come down.

6/24/2023

-A few weeks prior to accident, while driving down a 65mph highway in TX, vehicle side mirrors were folding inward. Continued to fold inward after hit button to open them multiple times. Even did this after pulled off highway and stopped/started vehicle and exiting vehicle and locking to try to create a "reset" of system. (Auto folding windows feature in infotainment was NOT selected to be ON before or after this incident! Auto-folding sidemirrors are tied to the electron shifter status and should only engage when turned ON in infotainment option AND vehicle in PARK. This was occurring over 2-3 days while driving on highway at 65mph) Accident: -Pulled into parking spot and placed vehicle in PARK. -Front Dash Camera audio indicates the "Ding" confirmation of park and hear vehicle doors unlock upon Park status. -Vehicle was still ON and began to slow roll UP HILL BACKWARDS in parking lot and strike another parked vehicle across the double wide aisle. -No rear camera was engaged. -No collision alert (no seat vibration which was always ON in infotaiment option) -No automatic braking for about to strike a vehicle. -Display after impact was on the Buick Startup Icon, NOT the infotainment icons. -Vehicle driven immediately to Buick dealership and Claim initiated wth ESIS (regarding product liability claim with GM (General Motors) -no police due to private lot - 9 days later the black box data (Bosch Crash Data Report) and vehicle Global Diagnostics Sysem Reports were downloaded from Vehicle. Third report polling all the vehicle drive cycles was downloaded but not provided to me as consumer with claim. - No data obtained from CDR as not over 8mph and was backwards. -GDS2 indicates not DTC data most items but did indicate: 1)Rear Differential Clutch Control Module No Communication 2)Left Front Short Range Radar Sensor Module No Communication 3)Right Front Short Range Radar Sensor Module No Communication 4)Rear Short Range Radar Sensor Module No Communication

11/28/2022

The brake system ABS module/sensor malfunctions- yes it is available for further inspection. Safety is an issue due to the ABS indicator light on. Yes, the problem/issue has been confirmed by a dealership. No inspections have occurred other than the dealership. The only warning is the light indicator for the brakes, parking ABS.

12/10/2024

The car shuts off at random when coming out of autostop, the car will disable power steering when coming out of autostop to make turns making it difficult to turn the steering wheel. Coming out of autostop is typically when you are trying to go or make a turn. This has been an ongoing issue that happens often. The issues began around 60k miles.

8/26/2024

Wednesday August 6th 2025, I was coming home from work, the low engine compression and engine light came on the car was shaking and I lost power on a busy road, I had to pull it off the road quickly before I lost all power. I stayed there for a few minutes, then turned the car back on to retreat to a safer spot, I then waited for my husband to bail me out, we checked the oil on the dipstick, there was minimal oil on it. We added 1 quart of oil, then the lights went off, all seemed fine. August 23rd 2025, I was driving my car and the same thing happened car lit up with low engine compression and engine light came on car was shaking, I shit the car off. we added 1quart of oil. But the engine light stayed on after about 30 min. I shut the car off. The engine light went off after I shut the car off.

8/25/2025

The contact owns a 2018 Buick Enclave. The contact stated that while making a left turn, another vehicle jumped onto a curb and struck the rear end and rear tire of the vehicle. The front driver side, passenger side, and curtain air bags deployed. The contact was concerned about whether the air bags should have deployed for the type of impact experienced. No warning light illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. A police report was filed. The contact sought medical attention for bloody stool, lower back pain, and neck pain. The manufacturer was not made aware of the failure. The failure mileage was approximately 83,000.

9/15/2025

My vehicle has begun all us sudden flickering headlights from low beams to high beam when driving and also it ay the airbag safety light turn on with the locks also doing a closing and opening while driving.

12/21/2025

The headlights continously and irregularly flicker between high and low beam while driving at night. I have no control over it and cannot turn off the high beams when they activate. This is highly annoying to drivers ahead me, as they believe I am trying to get their attention (or be obnoxious). In these times and the legalization of open carry weapons in the state of Florida, this can be highly dangerous if the wrong person is aggravated by unintentional signaling. I have already had issues on the road with drivers not happy with the high beam flicking on and off at them while driving on the road. They have become very aggressive, following, slowing down, honking at me because they think I am being impatient or trying to tell them someting is wrong. I spent $2000 in January 2025 trying to get this fixed and it has started (December 2025) happening again.

12/11/2025

My vehicle has begun all us sudden flickering headlights from low beams to high beam when driving and also it ay the airbag safety light turn on with the locks also doing a closing and opening while driving.

12/21/2025

MY CAR SHIFTS ITSELF INTO WHAT SEEMS TO BE A 'NEUTRAL' STATE AND THEN REVS UP VERY LOUD. IT ALSO SLAMS ON ITS OWN BRAKES, THANKFULLY EACH TIME HAS BEEN AT LOW SPEED. TODAY WAS THE LAST STRAW. I AM NEVER GETTING IN TO THAT CAR AGAIN! AS I WAS LEAVING A PARKING LOT, MY CAR SLAMMED ON ITS BRAKES, ALL KINDS OF ROLLING SOUNDS UNDER MY FEET. THEN IT STOPPED AND HIT HARD TO START GOING AGAIN. LIGHTS ON MY DASHBOARD GOING CRAZY... THE GUY WHO WAS BACKING UP AS I WAS GOING BY, HONKED AND YELLED AT ME BECAUSE HE DIDN'T KNOW WHY I WOULD STOP LIKE THAT. I SHOULD HAVE BEEN WELL PAST HIM, BUT MY CAR DECIDED WE WERE STOPPING. SO A LITTLE SHAKEN AND UPSET, BUT I CARRIED ON. THIS CAR HAS BEEN DOING THAT SINCE 4000 MILES. IT IS VERY STRESSFUL TO GET IN THAT CAR AS IT IS. I SAT AT THE VERY NEXT RED LIGHT AT THE PARKING LOT I HAD JUST LEFT TO TURN LEFT ONTO A MAJORLY BUSY STREET. THE LIGHT WAS RED, WHEN IT TURNED GREEN, I APPLIED THE GAS AFTER A AND IT SURGED SO HARD, IT WAS AS IF I FLOORED IT ALL THE WAY, BUT THE PEDAL HAD NOT MOVED UNDER MY FEET, BUT I COULD FEEL ALL KINDS OF 'ACTION' HAPPENING UNDER MY FEET. AS THE CAR WENT OVER THE CROSSWALK PAINT, IT SCREECHED THE TIRES AND I ALMOST HIT THE GUY WHO WAS ALSO MAKING A LEFT NEXT TO ME AS MY CAR WAS THRUSTING FORWARD WITH GREAT SPEED AND SPINNING TIRES, WHEN THE WHEELS CAUGHT THE PAVEMENT I ALMOST HIT THE GUY NEXT TO ME IN HIS BACK DOOR. I WAS HONKED AT AND SCARED. I WAIVED MY HANDS TO TRY TO SAY ' I DON'T KNOW!' I DIDN'T KNOW WHAT TO DO. THE MAN FOLLOWED ME ALMOST A MILE TO MY WORK AND WHEN I GOT OUT OF MY CAR HE CALLED ME EVERY NAME YOU CAN THINK OF. THIS CAR IS REALLY SCARING ME AND I CANNOT DRIVE IT ANYMORE. I AM GOING TO TRY TO WORK WITH GMC TO TAKE IT BACK. I SHOULDN'T HAVE TO BE TERRIFIED TO GO TO THE GROCERY STORE. THIS CAR HAS DONE SIMILAR THINGS OVER THE LAST TWO YEARS BUT IT HAS ONLY GOTTEN WORSE. DEALER "CAN'T DUPLICATE"

7/23/2020

I AM TOLD BY GRAFF CHEVROLET, OKEMOS, MI, THAT AT ONLY 63,000 MILES, MY REAR TOE LINK ADJUSTMENTS ARE SEPARATING AND NEEDS TO BE REPLACED AT A COST OF $407 PLUS A $90 WHEEL ALIGNMENT PLUS TAX. IN MY RESEARCH, I SEE THAT THE GM CADILLAX SRX HAS HAD THE SAME ISSUE. I AM CONCERNED FOR MY SAFETY FIRST OFF, BUT ALSO BELIEVE GM SHOULD RECALL AND WARRANTY THESE PARTS.

12/21/2020

The contact owns a 2018 Buick Enclave. The contact stated that while driving approximately 35 MPH, the vehicle suddenly began to drive sluggishly before coming to a stop. The brake warning light had illuminated and the message service ABS system was displayed. The vehicle was towed to the local dealer who diagnosed that the ABS computer had lost its program and needed to be reprogrammed. The vehicle was not yet repaired. The manufacturer was not contacted. The failure mileage was 52,000.

2/23/2022

Lane departure went out took to dealer they said oh your out of warranty 3 months we can repair for 1,000 dollars I said you are crazy and walked away .contacted GM customer service said it’s out of warranty should of been recalled for their past history of problems

8/8/2022

The contact owns a 2018 Buick Enclave. The contact stated that while idling or at a complete stop, the vehicle lunged forward upon acceleration. The contact then stated that while shifted to park, the vehicle inadvertently started. The contact also stated that she heard a screeching sound in the wheels while shifting in the first gear, and intermittently in second and third gear. Additionally, the contact stated that the check engine warning light was previously illuminated; however, after driving the vehicle, the check engine light turned off. The vehicle was taken three times to the dealer where the failure could not be duplicated. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was informed that the warranty was not honored, and no assistance was provided. The failure mileage was 125,639.

2/21/2023

I am a [XXX] and owner of a 2018 Buick Enclave that suffered a catastrophic transmission failure which nearly killed me and my child. On Friday, [XXX], while driving westbound on [XXX] from Edison, NJ to my home in Easton, PA, my vehicle suddenly and without warning came to a complete halt in the fast lane. A driver tailgating me swerved at the last second to avoid impact. Moments later, when I tried to move again, the car lost all power and drifted helplessly across two lanes of speeding traffic, directly into the path of two tractor-trailers barreling down at highway speeds. This was the hottest day of the summer, and I was left in terror, fully aware that one wrong move would have ended our lives instantly. The fact that my child could have lost their only parent because of a mechanical defect is beyond unacceptable. The stress, fear, and trauma of this incident cannot be overstated—it was a near-fatal event that never should have happened. My mechanic has since confirmed the transmission is destroyed, with black metal fragments throughout—clear evidence of internal failure. Only two months earlier, in June 2024, the car passed inspection with no codes or signs of a problem. This was not wear and tear; it was a hidden, catastrophic defect. In December 2024, GM recalled more than 461,000 vehicles, including certain 2018 Enclave models, for transmission defects leading to rollaway and internal failure. Source: The Lemon Firm, 12/18/24 [XXX] ). My case mirrors the defect exactly, yet I never received recall notice. I demand GM confirm my VIN’s inclusion and cover the full cost of repair or replacement. I barely escaped a fatal crash. GM must act immediately before lives are lost. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

8/25/2025

The contact owns a 2018 Buick Enclave. The contact stated that after picking up the vehicle from the dealer for a different failure, the exhaust pipe made an abnormally loud sound while driving. The check engine and other unknown warning lights were illuminated. The vehicle was taken back to the dealer, who determined that the catalytic converter had failed and informed the contact that the catalytic converter and the front exhaust pipe needed to be replaced. The vehicle was not repaired. The contact related the failure to Special Coverage Adjustment: N212356540 (Front Exhaust Pipe); however, the VIN was not covered. The manufacturer was made aware of the failure and advised the contact to report the failure to the NHTSA Hotline. The failure mileage was approximately 100,000.

11/19/2025