2024 GMC Sierra 1500: engine knocking or ticking

Filed Oct 7, 2026 · Engine · IA

Truck has been making a ticking noise for about the last four months. Yesterday, October 7, 2026 I stepped on the accelerator the engine paused a second and blew out gray smoke through my exhaust I saw in my rearview mirror. There is a delay in power from the time I put my foot on the accelerator when it actually gets moving faster.

Filed Sep 18, 2026 · Engine · FL

I am reporting a catastrophic engine failure on my GM vehicle equipped with the 6.2L L87 V8 engine. This failure occurred AFTER the official recall remedy (Recall 25V‑274/ GM Recall N242494000) was performed on my vehicle, which directly aligns with the federal safety agency's active investigation under Engineering Analysis EA26005. The recall service was completed by an authorized GM dealership on XXX at 22,489 miles, the vehicle had the L87 Engine Loss of Propulsion recall completed and the PICO L87 Diagnostic Testing was completed and passed with recommended updated oil change to Mobil 1 Supercar 0W-40 (19432866) quantity 8 with 12737081 Filter and Cap Changeout. On XXX, at 26,752 miles, the engine suffered a catastrophic total mechanical failure. While driving, the vehicle experienced a sudden loss of motive power and a complete shutdown with no prior warning of any kind while driving down [XXX] at approximately 45 to 50 MPH. This created an immediate safety hazard on a public roadway. The vehicle was towed to Key GMC in [XXX] where technicians confirmed Engine Seized Up. Spun connecting rod bearings at cylinder 7&8. The vehicle was at the dealership awaiting parts for repair for 65 days due to engine backorder (engine, radiator, starter, cooling lines and miscellaneous parts ultimately replaced). Because this failure occurred after GM's official remedy was implemented, the recall clearly failed to correct the underlying safety defect. I request that NHTSB include this incident in its ongoing evaluation GM's 6.2L engine issues under EA26005. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 10, 2026 · Engine · FL

While driving on the highway, i went to pass someone and there was a big shutter in the engine and then a load ticking noise from the engine after. All of the lights came on and the vehicle was running rough

Filed Sep 2, 2026 · Engine · AL

I received a notice months ago for possible engine problems. my dealer checked it out and everything was good except for changing oil from 0W-20 to 0W-40. i was in Atlanta, GA on 8/26 and by the time i got home on 8/27, engine was knocking. I barely made it home. the dealer has had the truck since. they said i have to have a new engine. no idea when they will get one inn or when i will get my truck back. i opened a claim with GM (Case #108927907). GM basically offered no assistance, help, etc. i even tried to trade the truck back to my local GM dealership for another truck and they wouldn't offer enough on trade inn (says they wouldn't be able to sell it), GM Corporate wouldn't offer buy back, loyalty program money, etc. as they claim it's under a recall. I have never received anything about a recall for the engine. local Ford or Toyota dealerships will not even consider taking it in on a trade after new engine, says they cannot sell because of engine issue with 6.2L engine. so i'm stuck with a truck that i cannot sell or trade and is now worthless. I'm sure the new engine will fail as well.

Filed Aug 28, 2026 · Engine · TX

I purchased a new 2024 GMC Sierra. I brought it to the dealer for the engine recall on the 6.2liter. It passed the inspection and the oil was changed to a heavier weight. After the recall was satisfied and the oil was changed to the heavier weight, around 45,000 miles, the engine failed at highway speeds while pulling a trailer and left my entire family stranded on the side of the highway; late at night. The engine completely failed and would not re-start. After researching the issue online and watching mechanics tear down these engines and suggest the problem, I believe that GMC has created great harm to the customers who've purchased the vehicles with 6.2L engines by allowing us to drive hundreds of thousands of "ticking time-bombs" across the country. Furthermore, it is absolutely infuriating to learn that problems clearly identifiable starting in 2021 were not addressed until a recall in April 2025. I strongly believe that G.M. has mishandled this information and put customers into vehicles that are verifiably unreliable and should correct the problem/take the hit to replace these faulty engines. !!TIMEBOMBS!! [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 25, 2026 · Engine · TX

On 4/30/25- I took my truck to the dealership due to receiving a recall notice (engine propulsion) in the GM app. No codes camp up and got the all clear. Dealer did not change oil to 0/40 nor air filter. Advised GM had not provided the recommended oil yet On 10/06/25- the Engine propulsion fix was completed. Oil changed to 0/ w40. Engine module reprogramming completedNext. On 3/07/26- dropped off my Sierra truck at dealership. Ticking sound. Confirmed engine replacement was needed even after the oil viscosity change. 4/22/26- Replaced engine assembly, radiator, gaskets, hose, belt kit. At the time of the engine replacement, the truck had only 16,756 miles. As of 8/25/26, having an oil compression test completed as the replacement engine has been excessively burning oil. Needed the dealership to complete an official text for GM, but from checking the oil, the vehicle has short @ 1quart of oil every 1,000 miles.

Filed Aug 5, 2026 · Engine, Transmission · IL

Ever since I bought this truck new, I noticed a lot of metal shavings and debris in the oil filter every single time I changed the oil. I took it to the dealership multiple times to have this looked into before the engine recall came out. The dealership took pictures of the metal and sent them to a General Motors engineer, but the engineer just told them it was "normal." Later on, the truck went in for the official recall inspection, passed the PICO test, and nothing was fixed. Then on August 4, 2026, I was driving on a crowded expressway right through a construction zone with absolutely no shoulder to pull over on. Out of nowhere, the truck started hesitating badly, lost power, and the engine started making a really loud knocking noise. It was barely running, and it was incredibly dangerous because there was nowhere to go and traffic was heavy. Luckily, I was able to limp the truck along just far enough to clear the construction zone and pull over safely.

Filed Aug 5, 2026 · Engine · IL

Ever since I bought this truck new, I noticed a lot of metal shavings and debris in the oil filter every single time I changed the oil. I took it to the dealership multiple times to have this looked into before the engine recall came out. The dealership took pictures of the metal and sent them to a General Motors engineer, but the engineer just told them it was "normal." Later on, the truck went in for the official recall inspection, passed the PICO test, and nothing was fixed. Then on August 4, 2026, I was driving on a crowded expressway right through a construction zone with absolutely no shoulder to pull over on. Out of nowhere, the truck started hesitating badly, lost power, and the engine started making a really loud knocking noise. It barely ran, and it was incredibly dangerous because there was nowhere to go and traffic was heavy. Luckily, I was able to limp the truck along just far enough to clear the construction zone and pull over safely. the truck was towed to the dealer were they confirmed the engine was blown, and needs replaced.

Filed Jul 28, 2026 · Engine · AZ

Unknown. Went in to get inspection for the recall on the motor and it failed the test so motor was replaced. Now the I've hade the motor for 9 moths started hearing knocking in the motor and losing power.

Filed Jul 26, 2026 · Engine · GA

The engine (6.2L V8) in my 2024 GMC Sierra 1500 AT4 failed at approximately 40,750 miles. I began hearing a ticking noise coming from the engine, and the dealership subsequently diagnosed the cause as damaged bearings that in turn damaged the crankshaft, requiring a full engine replacement. Notably, this vehicle was not included in the related recall covering this engine defect, despite exhibiting the same failure. The original failed engine may be available for inspection upon request but I would need to confirm with the dealership whether it was retained or already returned to GM under warranty. This defect creates a serious safety risk because a damaged crankshaft and bearings can cause the engine to lose power or shut off without warning while driving. An unexpected loss of engine power at highway speed or in traffic could result in loss of vehicle control, reduced ability to accelerate out of a hazard, and increased risk of a collision to myself and to other drivers on the road. The failure gave no advance warning, so there was no opportunity to pull over safely before the issue became apparent. The fact that this failure occurred outside the scope of the existing recall suggests other vehicles with the same defect may be similarly at risk without notice. The dealership diagnosed damaged bearings and a damaged crankshaft as the cause of the ticking noise and performed a full engine replacement under warranty, confirming the failure. The dealership diagnosed the failure and performed the repair; I do not have direct confirmation of whether GM's engineering or warranty division conducted a separate inspection of the failed components beyond the dealer-level diagnosis. No warning lights or messages appeared on the dashboard at any point. The only symptom prior to failure was a ticking sound from the engine which I noticed shortly before the engine required replacement. I was not provided any electronic warning that would have alerted me.

Filed Jul 22, 2026 · Engine, Fuel system · MA

I was driving on the highway when the vehicle started to make clinking noises. The vehicle started to lose power as I accelerated it would feel like something was pulling me in the opposite direction and the knocking noise would get louder. Ultimately, I had the vehicle towed to a dealership. This vehicle passed the L87 recall not too long ago, and the vehicle is barely used.

Filed Jul 16, 2026 · Engine · NJ

On XXX I started on a 3 hour trip with my daughter in the truck. My vehicle lost power and started knocking in the engine compartment. We were going over a very big Bridge([XXX]) from [XXX] to [XXX]. I had to coast off the highway and made it to a park. Truck would not restart and would not go into neutral. Waited 5 hours for AAA and was drug onto the flat bed truck because it would not go into neutral. It was then towed to the dealership(Union Park GMC) in [XXX], where they had to drag it off the flat bed truck. Truck was evaluated and determined by the technicians that it needed a new engine(6.2 L V8). Engine was tested and passed in October 2025. Still waiting on a new engine to be installed(today is XXX). GMC knows there are issues with these engines failing and continue to sell to the consumer. I am currently paying for a truck that I am not able to drive. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)