2014 Chevrolet Silverado 1500: misfire or rough idle

Filed Jul 9, 2026 · Engine · SD

While driving, the vehicle suddenly developed a severe, loud mechanical ticking noise from the engine compartment, immediately followed by a drastic loss of engine power and violent vehicle shaking. The vehicle experienced an active cylinder misfire caused by a failure within the Active Fuel Management (AFM) system, where a cylinder deactivation lifter collapsed and became stuck.This mechanical failure creates an extreme safety hazard. The sudden drop in throttle response, engine stuttering, and loss of power impair my ability to maintain highway speeds, merge safely, or accelerate away from oncoming traffic. The engine stumbles significantly under load, risking a rear-end collision on public roads. The vehicle remains unrepaired at this time due to the catastrophic nature of the valvetrain defect and the severe risk of complete engine seizure while in motion. General Motors has failed to issue a safety recall for this known structural valvetrain defect, which poses an immediate hazard to drivers on the road.

Filed May 30, 2025 · Engine · MI

I was driving home from work on 5/9/2025 and my truck slowly started to loose power and I almost got rear ended going up a hill. NO check engine lights or symptoms noted prior I was able to make it to the Chevy Dealer here in town where i Live and dropped off. dealer noted cyl 4 has a misfireand there is a tick noise on that bank.checked and found no compression on cyl 4, removed valve cover and found that the lifter for cyl 4 is broken and pushrod bent. After reasearching found this to be a common problem, contacted Chevy reagarding this as truck is low miles (88k) NO help offered.

Filed Dec 27, 2024 · Engine · 100,000 miles · IN

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, who identified a misfire in cylinder #4, resulting in damages to the lifters and camshaft. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 100,000.

Filed Aug 11, 2024 · Engine · MI

check engine light came on and the code was cylinder 7 misfire 'code p0307'. it was replaced the first time and only lasted less than two months. the same code came up again and when they put a new one in they had to tow it back because it failed not even 30 minutes later.

Filed May 30, 2024 · Engine, Transmission · 69,000 miles · MI

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated while driving 50 MPH, the vehicle began to jerk. The vehicle downshifted and upshifted violently. There was smoke coming from the tailpipe. The accelerator pedal was depressed, but the vehicle was slow to respond. The vehicle stopped and lunged forward. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic who was unable to service the vehicle and referred the contact to the dealer. The vehicle was taken to the local dealer, where it was diagnosed that the fuel injectors and cylinder #7 needed to be replaced. The vehicle was repaired. The OnStar error message was displayed and stated to disregard. The contact used and OBD tool and retrieved DTC code: P0207 (Power Train injector) and P0300 “Power train”; and a random cylinder misfire was detected. The manufacturer was contacted and informed the contact there were no open recalls on the VIN. The failure mileage was approximately 69,000.

Filed May 25, 2023 · Engine · CA

Faulty Active Fuel Management Lifter, Cylinder 6 Misfire causes engine to suddenly lose power. Mechanic has replaced faulty Lifter twice within a couple weeks and same issue keeps occurring.

Filed May 20, 2023 · Engine, Fuel system · TX

- 2014 Silverado AFM/DFM/lifter failure. - While driving, truck misfired and lost power without warning or check engine light. - Truck abruptly slowed down, forced to pull over putting myself and others in danger. - Turned off engine and restarted, still no check engine light. - Started driving again but had constant misfires and ticking noises. - Took truck immediately to the shop. - Service center confirmed lifter failure and common issues with AFM/DFM. - The truck is a one owner vehicle which is current on all maintenance/service. - No previous symptoms or warnings of premature lifter failure.

Filed Dec 31, 2022 · Engine · OH

Automatic fuel management system failure has caused a p0300 code as multiple misfire diagnosed to cylinder 4 dead with no compression. This vehicle is no longer drivable and I still owe $21,000. GM knows of this failure for a long time. At current I have no way to pay for repairs and making payments on a truck I can not drive. I bought this vehicle used at 83,000 miles and have put 16,000 miles on it in 2 1/2 years

Filed Dec 31, 2020 · Engine, Transmission · 88,000 miles · MI

Truck began to idle rough and would jerk during taking off and stopping. Check engine light began flashing and stabilitrak light came on. Took it to a mechanic who reported fuel buildup. I was told that the pistons were broken as well. My truck has 88,000 miles on it and gm refuses to fix it even though there are service bulletins pertaining to the engine misfire from fuel buildup because the truck is greater than 5 years old.

Filed Nov 5, 2015 · Transmission · 34,000 miles · VA

@ around 32,000 miles I threw a code, stabilitrack system engaged and it had a significant lose in power. I checked the code and it was a misfire in cylinder 7. I brought my truck to the local chevy dealer and they replaced the ignition coil and plug wire. Now at 34,000 miles it happens again. But this time to cylinder 6. Knowing what to look for I checked the wire, which was hanging freely from the plug, and it was corroded inside the boot and I'm sure the coil was as well but I had it towed to the local dealer to be repaired.

Filed Jul 30, 2014 · Engine · 8,554 miles · IL

I was driving on the highway at 55mph when I noticed the engine malfunction light came on and shortly after began to flash and the engine was running rough like a fouled out plug, so I was close to my home but before I got there the truck was running even rougher and the transmission shifted very hard also. I called the dealer and they told me not to drive it have it towed via chevys 2 year road assistance, so I called and after waiting and calling back 5 times I called my own tow service and got it into the dealer. They said a code for engine misfire cylinder # 5 and replaced bad wire with a new one. On my ticket it says bulletin pip5159. The mechanic told me usually these plug wires had been failing on trucks with less miles then mine. So I asked if the other wires could fail and he said yes-so be aware and ready for more to fail.