2021 Chevrolet Suburban: engine stalls while driving

Filed Sep 14, 2026 · Engine · FL

I am filing this complaint regarding a serious engine and safety issue with my 2021 Chevrolet Suburban equipped with the GM 6.2L engine, with approximately 45,500 miles. The vehicle has developed a noticeable and abnormal shaking/vibration coming from the engine. At the same time, the vehicle experiences a significant loss of power, at times becoming so severe that the engine feels as though it is going to shut off. This is a serious safety concern. A sudden loss of engine power could occur while driving in traffic, accelerating, merging, or traveling at higher speeds. The vehicle may become unable to accelerate properly or could potentially stall, creating a significant risk of a collision. I am concerned that this issue may be related to a defect affecting GM's 6.2L engines. The fact that this is occurring at approximately 45,500 miles is particularly concerning, as an engine should not experience this type of severe shaking and loss of power under normal operating conditions. I respectfully request that the federal safety agency investigate this issue and determine whether there is a safety-related defect affecting the GM 6.2L engine used in the 2021 Chevrolet Suburban and other GM vehicles. I am reporting this because I believe the sudden loss of power and potential for the engine to shut off could endanger the occupants of the vehicle as well as other motorists

Filed Sep 14, 2026 · Engine · FL

I am filing this complaint regarding a serious engine and safety issue with my 2021 Chevrolet Suburban equipped with the GM 6.2L engine, with approximately 45,500 miles. The vehicle has developed a noticeable and abnormal shaking/vibration coming from the engine. At the same time, the vehicle experiences a significant loss of power, at times becoming so severe that the engine feels as though it is going to shut off. This is a serious safety concern. A sudden loss of engine power could occur while driving in traffic, accelerating, merging, or traveling at higher speeds. The vehicle may become unable to accelerate properly or could potentially stall, creating a significant risk of a collision. I am concerned that this issue may be related to a defect affecting GM's 6.2L engines. The fact that this is occurring at approximately 45,500 miles is particularly concerning, as an engine should not experience this type of severe shaking and loss of power under normal operating conditions. I respectfully request that the federal safety agency investigate this issue and determine whether there is a safety-related defect affecting the GM 6.2L engine used in the 2021 Chevrolet Suburban and other GM vehicles. I am reporting this because I believe the sudden loss of power and potential for the engine to shut off could endanger the occupants of the vehicle as well as other motorists

Filed Sep 14, 2026 · Engine · FL

I am filing this complaint regarding a serious engine and safety issue with my 2021 Chevrolet Suburban equipped with the GM 6.2L engine, with approximately 45,000 miles. The vehicle has developed a noticeable and abnormal shaking/vibration coming from the engine. At the same time, the vehicle experiences a significant loss of power, at times becoming so severe that the engine feels as though it is going to shut off. This is a serious safety concern. A sudden loss of engine power could occur while driving in traffic, accelerating, merging, or traveling at higher speeds. The vehicle may become unable to accelerate properly or could potentially stall, creating a significant risk of a collision. I am concerned that this issue may be related to a defect affecting GM's 6.2L engines. The fact that this is occurring at approximately 45,000 miles is particularly concerning, as an engine should not experience this type of severe shaking and loss of power under normal operating conditions. I respectfully request that the federal safety agency investigate this issue and determine whether there is a safety-related defect affecting the GM 6.2L engine used in the 2021 Chevrolet Suburban and other GM vehicles. I am reporting this because I believe the sudden loss of power and potential for the engine to shut off could endanger the occupants of the vehicle as well as other motorists.

Filed May 31, 2026 · Engine, Fuel system · AR

Vehicle stalled during routine driving. Code P129F. I was stranded in 95 degree weather with three small children. Please correct and advise ASAP. Had to be towed home. Vehicle inoperable.

Filed Mar 20, 2026 · Electrical, Steering · NE

I am submitting this complaint to report a serious safety issue involving my 2021 Chevrolet Suburban equipped with the 3.0L Duramax diesel engine. The vehicle has experienced a recurring problem related to the engine wiring harness. While driving, the vehicle will unexpectedly stall without warning. At the same time, there is an immediate loss of power steering assist, significantly reducing the ability to safely control the vehicle. This creates a dangerous situation, especially at highway speeds or in traffic. The failure appears to be linked to a defect or malfunction in the engine wiring harness, which may be causing intermittent electrical interruptions to critical engine systems. There were no prior warning signs sufficient to prevent the incident. This issue poses a substantial safety risk not only to the driver and passengers but also to other motorists. Sudden engine shutdown combined with loss of steering assist increases the likelihood of a crash. I believe this may be a systemic defect affecting other vehicles of the same model and configuration. I urge the federal safety agency to investigate this issue and determine whether a recall should be issued. Vehicle Information: Make: Chevrolet Model: Suburban Year: 2021 Engine: 3.0L Duramax Diesel

Filed Mar 11, 2026 · Engine · 92,000 miles · NY

The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving 35 MPH on the highway, the vehicle stalled. The contact pulled over to the side of the road. There was no warning light illuminated. The vehicle was towed to an independent mechanic, where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was repaired out-of-pocket. The contact related the failure to the federal safety agency Campaign Number: 25V274000 (Engine and Engine Cooling). The manufacturer was notified of the failure and informed the contact that the VIN was not under recall. The failure mileage was approximately 92,000.

Filed Feb 14, 2026 · Engine · GA

My vehicle was taken in to shop due to recall recommendation I received in GM app for fuel pump control module . After repair was done my engine begin ticking the same day and failed a week later . I documented the whole thing and filed a claim with GM however the dealership that did the repair are not responding to GM . The dealership is alm Chevorlet south in Jonesboro ,GA this vehicle stalled out while I was on the highway . Please help me this vehicle belongs to my limo fleet and this is detrimental to my business . After multiple attempts to get it diagnosed they kept telling me I had to wait in line for weeks out to get it checked out although the problem arose after the new part installation . Then when I brung it back with failed engine soon after they told me that I had to sign a liability release waiver for them to check out the vehicle stating that the vehicle was high mileage and not their fault . The service manager literally instructed me not to leave my vehicle when I wanted to because it would not speed up the process for it to be seen I brung it back when instructed but it was to late because the engine had already failed . They literally forced me to sign a waiver stating that they wouldn’t diagnose it if i didn’t sign the waiver . These people are committing a fraudulent scam and their are unsafe vehicles on the road that arent being treated properly due to these practices . Please contact the dealership and or GM to take this matter more seriously .

Filed Jan 30, 2026 · Fuel system · FL

My 2021 Chevrolet Suburban stalled while driving in late September 2025 and had to be towed to a dealership. The vehicle is subject to an active fuel pump power control module safety recall that has been in effect since 2021. The vehicle was brought in specifically for repair of this issue. The work was processed under warranty, and I was charged a deductible. After learning the repair was directly related to an active safety recall, I requested reimbursement of the deductible, as recall repairs should be completed at no cost. That reimbursement request was denied. I have since been informed that the recall repair was never “completed,” and the recall still shows open in the manufacturer’s system. I am now experiencing shuddering and symptoms consistent with a potential stall recurrence. The original stall occurred while I was transporting my children, including special needs children who require regular transportation to school and therapies. The vehicle failure left us stranded at night in an unsafe area. Due to the prior stall, the unresolved recall status, and the recurrence of symptoms, I do not feel the vehicle is safe to operate. Thank you for your attention to this matter, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 27, 2025 · Engine · NJ

The car was driving at 60 MPH on a regular commute to work and the car was stalling and shaking and soon after the check engine light came on with multiple issues.

Filed Aug 26, 2025 · Fuel system · MD

I was standing at a red light with my foot on the brake and the car went into neutral and stalled. I could not restart the vehicle and had to be towed to the dealership where there confirmed a fuel pump module failure. There were no precipitating factors or warnings. This is extremely dangerous. The car is only 4 years old and many people have reported the same incident online, which often recurs, even after replacing the fuel pump. The dealership has ordered the part however it is on backorder without any estimated ship time. For a vehicle I paid over $70K for, this is concerning and frustrating. There is a known recall for 2021 Suburbans for this exact issue.

Filed May 19, 2025 · Engine · 23,906 miles · IN

The contact owns a 2021 Chevrolet Suburban. The contact stated that while pulling out of a parking spot in a parking lot, the vehicle stalled. The contact attempted to restart the vehicle and observed a knocking sound coming from the engine compartment. The vehicle was not able to restart. The vehicle was towed to the dealer where it was diagnosed and determined that the engine had seized and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 23,906.

Filed Nov 30, 2023 · Fuel system · AR

Vehicle stalled while driving in center lane on I-4 in Orlando in traffic. There were no warnings prior to the vehicle stalling. When trying to restart it, the low fuel warning appeared along with the check engine light. I was unable to restart the vehicle leaving us stranded in the middle lane of I-4 in heavy traffic. FL Road Rangers arrived to offer aid and had to manually place the vehicle in Neutral under the vehicle at the transmission. Vehicle was then pushed off the highway onto the shoulder. Vehicle was towed to Starling Chevrolet which was the closest Chevrolet dealer from the incident. Starling's Service Department had to replace the battery in order to run a diagnostic. Once the battery was replace, the diagnostic indicated that the issue is with the Fuel Pump Power Control Module Part No. 13544060 / 13554821. This part is on back order with no known availability time provided. Vehicle is still sitting at Starling Chevrolet. Although my vehicle does not show any open recalls, I found that the fuel pump power control module for the 2021 Chevrolet Suburban is part of a known Product Safety Recall N212332040 Stall While Driving.