Chevrolet Tahoe misfire problems

Filed Nov 4, 2026 · Engine · NC

The engine lifters have failed twice in our 2021 Chevy Tahoe. The first time was at 13k miles and the second time happened at 100k miles. Both times the failures put my family in an unsafe situation and almost led to a multicar accident. This is a known issue that multiple people report online in the 2021-2024 Chevy Tahoe. The first time the lifters went out, I had just purchased the car. I only had 13k miles on the vehicle when it began shaking and jumping while at a stop. As I drove further the car began violently shaking and making backfire noises. I had to stop the vehicle in the road, as there was no pull off. We had the vehicle towed to the dealership and they replaced them under warranty. They said the lifters had gone out and they resolved the issue. I asked at that time if this was normal and if it could happen again. I was told it was not normal and it was not something that should be happening on a new vehicle, but they had fixed the issue and felt comfortable that it was resolved. The second time happened just a couple days ago. There was no warning or lights that came on before the incident. My family was in the fast lanes on I-77, going about 70 mph, and the car began misfiring. It was making noises that grew loud and then the car began violently shaking. We were forced to pull off the interstate abruptly. This put us in an extremely unsafe situation. The car is only at about 100k miles and 5 years old. We had the car towed to a Chevy dealership and were told the lifters went out again. This time damaging the cam shaft as well. It is a $6,600 repair, as the car is out of warranty now. This issue should not be happening, especially not multiple times, on a car that is only 5 years old. I believe there is a defect. When there are no warning lights that alert you to a potential issue, this causes an extremely unsafe situation for drivers, passengers, and surrounding vehicles.

Filed Oct 26, 2026 · Engine, Fuel system · 130,000 miles · CA

The contact owns a 2017 Chevrolet Tahoe. The contact stated that the check engine warning light was illuminated on the instrument panel. The contact stated that the vehicle hesitated while depressing the accelerator pedal after cold starting the vehicle. After a diagnostic test by an independent mechanic, DTC: P0300, P0420, and P0500 were retrieved, indicating an engine misfire. The mechanic informed the contact that the fuel injectors needed to be replaced. The manufacturer was notified of the failure and confirmed that there were no open recalls associated with the VIN. The failure mileage was approximately 130,000.

Filed Oct 21, 2026 · Engine · TX

At approximately 80,700 miles, I started my 2019 Chevrolet Tahoe (6.2L V8) to take my family on errands. My wife heard a squeaking noise from the engine as she walked to the vehicle, and I got out and heard the same noise. No warning lights or messages appeared on the dashboard, before or after. I took the vehicle to an independent repair shop, expecting a belt problem. After inspection, the shop told me the valve lifters had failed and needed replacement, and that the camshaft would likely need replacement as well. I declined the repair and took the vehicle to a GM dealership for inspection and documentation. The GM dealer confirmed the lifters need replacement. They could not confirm whether the camshaft is also damaged without an engine tear down, which I have not authorized. The dealer estimated $13,200 to replace the lifters and camshaft. The independent shop estimated $8,200. The vehicle has not been repaired, and the failed components are still in the engine and available for inspection. I am concerned for my family’s safety. Lifter failure on this engine can cause misfires, loss of power or engine failure while driving. We use this vehicle to transport our family, and a sudden loss of power on the road could cause a crash.

Filed Oct 21, 2026 · Engine · TX

The dealership diagnosed the truck after investigating a ticking noise and engine misfire. During the inspection, they removed the valve cover and found that one of the pushrods on cylinder #5 was bent. Further disassembly revealed that both lifters on cylinder #5 had failed, causing excessive wear on the camshaft lobe. As a result, the dealership determined that the necessary repair was to replace the camshaft and all 16 lifters. The engine was then cleaned, reassembled, and tested to ensure proper operation. The root cause of the issue appears to have been a failing lifter, which led to damage of the associated valvetrain components.

Filed Oct 8, 2026 · Engine · CA

I was picking my Tahoe up after a replacement on the blown motor was complete. (L87) I started it and immediately knew something was wrong. I reported it to the service advisor and the response was there were no warning lights so it must be fine. I asked them to sit in my car and they agreed it was not running right. They took it back and replaced a sparkplug that was causing the #2 cylinder to misfire. Almost 3 months later I was driving on the freeway when my Tahoe felt like it was going to stall. Again I had no warning lights appear. The diagnostics showed the same #2 cylinder misfiring caused by another sparkplug issue. This is all within 2,500 miles on a brand new engine.

Filed Sep 27, 2026 · Transmission · AL

[XXX] Diagnose on XXXX vehicle shudder dealer stated felt some tire vibration. Back to the dealer in August same issue. Tahoe shudder and misfiring first seen by [XXX] chevy of [XXX] on XXX stated it the DFM and its very pronounced. There is no correction that can be made to change this shudder. XXX service transmission, not able to shift soon warning light came on while driving down the road multiple times. Dealership stated caused by low voltage charged battery and sent me on my way. went back and GM had them to check battery over again and again and they finally replaced my battery. XXX back in the shop at Bentley Chevrolet Florence AL. kept 2 weeks. Stated shudder is a normal operation from the GM tech. also received a misfire code as it clearly is missing while at idle it almost acts as if its going to go dead at a red light. tach case # XXXBentley tech stated that GM reviewed data their response was this is a normal operating condition. This vehicle has only 23,000 miles its a 2023 Tahoe z71 and still under the powertrain warranty, but they refuse to fix the misfire acting like its going to go dead at a red light. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 25, 2026 · Engine, Fuel system · FL

My 2022 Chevrolet Tahoe equipped with the 5.3L V8 experienced a severe engine failure at approximately 92,144 miles. The vehicle developed multiple misfires and was towed to the Chevrolet dealership for diagnosis. The dealership documented a failed lifter, significant camshaft damage, metal in the engine oil, and metal contamination throughout the engine. The engine had to be replaced with a complete long block at a total cost of approximately $14,395. I am concerned because this was a major internal engine failure at relatively low mileage, involving a lifter and resulting in extensive engine damage. GM has issued technical service information regarding lifter-related conditions and misfires affecting the 5.3L L84 engine family, which is the engine in my vehicle. GM provided $1,859.29 in partial repair assistance but has declined any additional assistance. I am reporting this failure because I believe the nature and severity of the engine failure warrant investigation for a potential recurring safety or reliability issue involving the 5.3L L84 engine.

Filed Sep 23, 2026 · Engine, Transmission · SD

While driving the vehicle at highway speeds the vehicle starts to lurch or randomly lose power. Eventually, within a few minutes, the lurching gets worse and the check engine light starts flashing. In a GM vehicle, a flashing check engine light is critical engine failure. After pulling the vehicle to the side of the road, the check engine light stops flashing and stays on constantly. After about 10-15 minutes, the check engine light turns off completely. The GM dealership can read the history and says it's P0300 error code for General Engine Misfire in cylinder #6. GM warranty refuses to fix anything because the light isn't on when the car comes into the dealership. The car has been to two different dealerships, with both of them telling me it has the same error code. GM customer service told me without the check engine light being on when the vehicle is brought into the dealership, they would not be able to help me. This is being told to me even though everyone agrees that the check engine light has been on. I was told by GM to continue to drive the vehicle. It has been into the shop 4 times since January for the same issue. This is not safe as the engine has suffered a critical issue. I don't feel safe driving the vehicle. My GM Customer Service case is 110460594.

Filed Sep 22, 2026 · Driver assistance, Engine · CA

On [XXX], while driving near Mammoth Mountain, California (Highway [XXX]), the vehicle suffered a sudden, severe engine malfunction. The engine began misfiring violently, accompanied by a loud, mechanical clacking noise, and experienced an immediate loss of propulsion power. This mechanical failure left my family—including young children—completely stranded on the side of a mountain highway in a secluded wilderness area with dropping temperatures (39°F) and active local wildlife Because the vehicle could not safely maintain highway speeds or generate sufficient power, it created an immediate and severe traffic safety hazard, forcing us to secure emergency transport for the vehicle. Which took 4hours for someone to come out to the secluded hwy on a holiday weekend. Dealership Diagnostic Findings A formal inspection conducted by a certified General Motors dealership (Michael Hohl Motor Company) confirmed the following: Symptoms: Gas engine diagnostic confirmed "Misfire, and clacking noises coming from passenger side of the motor." Diagnosis: Cylinder Head / Valve / Lifter / Lash Adjuster failure. The dealership documented a collapsed lifter and recommended a complete engine tear-down to inspect lifters and pushrods for wear or bending. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 14, 2026 · Engine · 82,000 miles · LA

The contact owns a 2023 Chevrolet Tahoe. The contact stated there was a misfire in the engine, with the engine warning light illuminated. The message “Collision Mitigation System Off” was displayed. There was a burning odor coming from the vehicle after the failure. The vehicle started shaking abnormally. The vehicle was taken to the local dealer, where it was diagnosed and determined that the lifter and crankshaft needed to be replaced. The contact purchased a rebuilt engine, and the engine was replaced at another service center. The failure mileage was approximately 82,000.