2014 Chevrolet Silverado Engine Problems

6.2L LT1 GEN V AFM 138880 miles. Driving at highway speed no warning engine CATASTROPHIC FAILURE. Simotanious reaction first check engine light,no oil pressure,limp mode, piston connectioning rod thru side of block in 2seconds.Took to home town dealer. They reported to GM suposeabley. Dealer found lifter,valve spring,valve missing on right bank pulled oil pan found missing parts in little pieces.oil pan had 3 distinct holes in it. Ther had been no issues previous to this event.serviced regularly 5000miles by local dealer.

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.

I own a 2015 Chevrolet Silverado equipped with a GM V8 engine that experienced significant engine failure symptoms consistent with known GM engine defect issues and related recall/service campaign concerns. Prior to failure, the vehicle began exhibiting abnormal engine noises, warning lights, performance issues, and symptoms indicating internal engine damage. The condition worsened and resulted in major engine failure requiring extensive repair or engine replacement. The failure created safety concerns due to the potential for sudden loss of power and loss of propulsion while driving. Based on the symptoms, model year, and engine configuration, I believe the failure may be related to known GM engine issues involving internal engine components, lifter failures, AFM/DOD system failures, bearing damage, or related defects that have been the subject of recalls, special coverage adjustments, technical service bulletins, or investigations affecting GM trucks and SUVs. I believe the vehicle should qualify for coverage, repair assistance, recall-related repairs, or special policy consideration from General Motors due to the nature of the engine failure and the known history of similar failures affecting comparable GM vehicles. I am requesting that GM review the vehicle history, diagnostics, and failure condition to determine eligibility for recall coverage, special coverage adjustment, warranty assistance, or reimbursement related to the engine failure.

the truck went in for the fuel injector number 6 again. went in on June 13 and on the 12 as well. on the 12 they said it was the number 6 coil. they then gave it back but the next day had to be returned again for the same problem. this time they found the number 6 fuel injector was possibly shorted out. the service manager did call and said that i was right that it was the fuel injector. i feel that i paid for a coil that should not have been replaced in the first place.

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.

EVERYTHING, it started with spark plugs and boots which is normal, then all of a sudden one ignition coil after the other, then the transmission, now it's the valve cover gaskets, the ENGINE oil cooler lines, the rear main seal, the oil pan itself, like literally everything. The places I took it advised probably getting a whole new engine. Mind you I just financed this truck 2 years ago. The transmission cost me $6,700 dollars out of pocket because my power train warranty wouldn't cover it because some wire. I don't know but there is seriously big problems with this year make and model. Also, the catalytic converters are bad and the exhaust manifold. All these things can't be wrong all at the same time unless there was a major issue prior to me financing when Chevrolet spit these trucks out.

While driving to work a month ago (3/19/25) I lost the power to accelerate out of nowhere. And my truck started making this noise, what I can only describe as a winding up noise while trying to accelerate. I was going 55mph on a busy morning commute. There were no warning lights. I pulled over and shut the truck off. Checked oil (even though it was changed a week or 2 prior). Oil was fine. Let truck sit for 10 mins then tried to turn back on, it started but had that winding up noise when just sitting in idle, the check engine light then came on after it was on for a minute or so. Ran codes at home, and truck started making an additional rattle noise on top of the winding up noise when had to be turned on. One code was the crankshaft position sensor, we changed that out. Then the truck wouldn't start. Taken to Dealership, and they said initially they found a broken connector to the engine harness. Fixed that then truck started but still making the rattle/clunk type noise and louder than at home so they continued diagnostics because they said the noise sounds like a rod knock, so rod either being bent/broken/slipping. Further diagnostics found that oil and coolant are mixed along with metal shavings through engine so new engine is needed.

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated that while the vehicle was parked, there was an abnormal sound coming from the rear end of the vehicle. The contact discovered that there was white and blue smoke coming from the exhaust. The check engine warning light was illuminated. The vehicle was taken back to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

Ignition lock actuator faulty. Causing ingition to be stuck in start position.

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.

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated while driving 20 MPH, the engine made an abnormal knocking sound. There was no warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with lifters failure. The mechanic determined that the lifters needed to be replaced. Additionally, the mechanic informed the contact that if the camshaft had failed, the camshaft and the engine would need to be replaced. The vehicle was not repaired. The dealer was contacted and referred the contact to the manufacturer. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 147,000.

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated while driving 55 MPH and depressing the accelerator pedal, the vehicle failed to accelerate as intended and decelerated unintendedly. The contact pulled over to the side of the road, turned off and restarted the vehicle; however, the failure persisted. The contact was able to continue driving; however, the vehicle failed to exceed 20 MPH. There was no warning light illuminated. The vehicle was taken the dealer, where it was diagnosed and determined that the engine lifters needed to be replaced, and the contact was provided an estimate for the repair. The vehicle was then taken to an independent mechanic, where the upper part of the engine was rebuilt, and the lifters were replaced. The vehicle was repaired. The manufacturer was notified of the failure. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was 98,000.

I have put 2 cat converters in 2 yrs in this truck there was a recall for an engine control module that when it gets heated could start a fire but it gets too hot and the converter gets clogged and oil starts going through engine. The dealer us out of business and went to jail. I can't keep putting new converts in and can't get inspection sticker because it causes the check engine light yo come on. What do I do now?

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.

Lifter failure

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated that upon taking the vehicle to the dealer for an oil change, she was informed that the radiator was leaking. The dealer determined that the radiator, thermostat, and the coolant lines needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that the vehicle was not covered under GMC Special Coverage Number: N15170099. The failure mileage was approximately 71,000.

The air conditioner condenser has a small leak causing the refrigerant to leak out. This is a known problem with all gm Silverado 2014-2017 and a recall needs to be issued. They are all leaking in the same place due to a faulty weld from the factory.

Lifter failure happened while traveling home from Florida to SC. I was towing a vehicle and barely made it home. Having to drive at low speeds on the interstate put me at risk for accident. Now that I’m home I’m losing money because I have been unable to work due to not being able to drive the truck. The dealership quoted me $4700 to fix when there is a known class action lawsuit for this exact problem. GM should just replace these motors. This is very dangerous. There were no prior warning signs it just started ticking after stopping for fuel.

- 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.

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.