Buick Envision check engine light comes on

Filed Sep 23, 2026 · Brakes, Electrical · WV

I was going to work in the morning. I went to stop at the redlight right at my work but my brakes were very firm and wouldnt push down. My service brake warning came up on my dash and service engine light came on. I had to practically stand up and press as hard as I could to get it to slow down enough to not rear end the person in front of me. I thank God I wasnt going very fast and thankfully the light was turning green at the same time so I just slowly rolled thru and pulled it into my work parking lot. I had to call a mechanic, When he looked under the hood first thing he saw was oil dripping very fast out of my engine out of the side of the mechanical vacuum pump. They towed it to car dealer garage and I had to have it fixed. It was the camshaft-driven mechanical brake vacuum pump failed while I was driving it. It resulted in a sudden and complete loss of any braking assist and my brake pedal was hard as a rock like you couldnt get it to barely move. I had this replaced.

Filed Sep 19, 2026 · Engine · TX

At 1,578 miles, my 2025 Buick Envision would not start in my garage and had to be towed to the dealer. The check-engine light was on. The dealer tore down the engine and found a spun No. 1 main bearing. GM replaced the complete engine under warranty. The vehicle remained at the dealership from November 10, 2025, through January 6, 2026, totaling 57 days. A similar engine failure while driving could cause an unexpected loss of power. I do not have the failed engine; its current location is unknown.

Filed Apr 24, 2026 · MI

got a check engine light on, took to dealer was a code 1098, the part is on back order told that it would not be available until middle of may, this happened to me at the end of march, now am learning that GM issued a recall on that part for their diesel Duramax engine, I think it is a GM wide problem.

Filed Mar 18, 2026 · Electrical, Engine · MA

Description of Safety Defect: While operating the vehicle at approximately 25-30MPH and make a right turn, the vehicle experienced a sudden and total loss of power/engine stall, accompanied by a "Check Engine" light and a "Reduced Engine Power" notification. This resulted in a near-collision on a public roadway. The vehicle's steering and braking response were significantly compromised during this event, creating an immediate life-safety hazard for the driver and passengers. Dealer/Manufacturer Response: The vehicle was recently in the possession of McGovern Buick GMC Westborough for service. Despite the vehicle exhibiting an active Check Engine Light (CEL), the dealership staff pressured the consumer to take delivery of the vehicle and drive it on public roads. The service advisor admitted in writing that the CEL was active but insisted the vehicle was "feel free to drive." Furthermore, the dealership attempted to falsify internal corporate safety notes to claim the consumer "insisted" on taking the vehicle, masking a known mechanical defect. This represents a willful suppression of a safety defect by a franchised dealer, which led directly to a hazardous operating condition. Injuries/Crashes: No crash occurred, but a near-miss was documented. Passenger experienced severe emotional distress due to the sudden loss of vehicle control in traffic.

Filed Mar 13, 2026 · Transmission · ID

The transmission on the vehicle failed. It is available for inspection. The vehicle began jolting, when accelerating from a stop, or when slowing to a stop. Seemed to be slipping out of gear while driving. We reported the incident to the dealership. They said they found nothing wrong. The issue continued, and the check engine light came on, so we returned to the dealer again. This time they found it needed the transmission to be rebuilt. They have had the car at the service center for 5 months. The parts they need are no longer available.

Filed Sep 23, 2025 · Engine · 179,000 miles · TX

The contact's friend owns a 2017 Buick Envision. The contact stated that while driving at approximately 45 MPH, the engine warning light illuminated. The vehicle was taken to an independent mechanic, who determined that the failure was due to the sensor for the catalytic converter. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted. The failure mileage was approximately 179,000.

Filed Aug 29, 2025 · Acceleration, Electrical · NY

The OnStar Telematics Module has malfunctioned and is causing SAFETY FEATURES to malfunction. It is causing the following to occur to the vehicle: 1. The faulty module is causing the car to shut OFF UNEXPECTEDLY MID DRIVE. Losing control of the vehicle instantly. No steering, no gas, no brake, no gear change. THIS can cause a CATASTROPHIC ACCIDENT at higher speeds on the highways. The battery is completely drained when technicians inspect it but the alternator is working properly. 2. Causes the vehicle’s safety features to malfunction and give alerts such as “Service Driver Assist”, “Lane Departure Unavailable”, “Forward Collision Assist Unavailable”, “Steering Control Unavailable Soon”. 3. Causes GPS, WiFi, and location system to fail. 4. OnStar safety button do not work 5. Causes the engine light to go on and off and causes the cars idling to run erratically. 6. The module causes NEW batteries to drain quickly, less than a year after purchase. I have had the car shut off on me twice MID DRIVE, I was lucky to be in areas of less concern and harm. I’ve had to purchase two batteries since the module malfunctioned. Less than a year apart. The dealership confirmed it was the Telematics Module January 2025. They have confirmed the part is on backorder and not covered under warranty. NO INDICATORS were given when the car shut off BOTH times that I may have noticed or heard.

Filed Aug 27, 2025 · CA

I bought a used 2023 Buick Envision with 49k miles on it. It was not covered under warranty due to mileage. A couple of weeks after purchase the CEL came on. It was originally diagnosed as a bad battery. It was later diagnosed as a failed Telematics Module. I had the module replaced on 8/23/25 so it is not available for inspection unless the dealer has it. After reading many complaints for the same problem on many different GM cars I suspect the bad battery had been drained by the failing Telematics module. Although it did not happen to me directly others have reported the car dying in the middle of the road because the battery died. The car has only been inspected by two dealerships since my purchase. I am reporting this because there are so many others facing this problem. I live in Los Angeles and my dealership was able to get the part and replace it. So many others are not even able to get the part. Their lives are being negatively impacted. I hope you can gather enough complaints and force GM to recall these modules or come up with a solution. This is dangerous and extremely frustrating for many consumers. Thank you for your time. PS - I can provide the invoice for the module replacement if you need it.

Filed Jul 24, 2025 · Transmission · TX

Check engine light is on Turbo is failing, underboost code. Very unsafe on roadway due to unpredictable loss of power. The issue has been diagnosed through my local service center. I have not taken it to a dealership yet but will be next week. The issue occurred three weeks ago I believe

Filed May 21, 2025 · Brakes, Engine · 96,000 miles · MS

The contact owns a 2017 Buick Envision. The contact stated that while driving at an undisclosed speed, the brake pedal seized. There was no warning light illuminated. The contact forcefully depressed the brake pedal to stop the vehicle. The contact stated that upon restarting the vehicle, the message "Service Brake Assist" was displayed, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed that the brake vacuum pump and the exhaust camshaft had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 96,000. The VIN was not available.