2024 Chevrolet Silverado 1500: harsh or hard shifting

Filed Nov 3, 2026 · Engine, Transmission · NJ

Follow-up to the federal safety agency complaint #11659972. My 2024 Silverado ZR2's 6.2L engine was replaced in May 2025 under recall 25V‑274. Around 13,800-14,000 miles the same symptoms returned: hard shifting, severe loss of fuel economy, sputtering, and the engine leaking oil every time I added more. The truck is unsafe to drive; an engine failure at highway speed could kill the driver, passengers and others. Service scheduled at Paramus Chevrolet for 12/10/2025.

Filed Nov 3, 2026 · Engine, Transmission · NJ

Follow-up to the federal safety agency complaint #11659972. On 12/10/2025 at 14,808 miles, under warranty, I brought my 2024 Silverado ZR2 (engine replaced May 2025 under recall 25V‑274) to Paramus Chevrolet for hard shifting, sputtering, severe fuel economy loss and oil leaks. The dealer opened a case with GM, drove it about 214 miles logging data, and sent the data to GM. GM refused to repair it. The truck was returned 12/16/2025 at 15,022 miles unfixed and unsafe; an engine failure at highway speed could kill the driver, passengers and others.

Filed Apr 10, 2026 · Transmission · WI

On 04/03/2026 at approximately 0545 I was heading in to work . While at a complete stop I proceeded to accelerate on the Highway 54 BRF WI. 54615 when the truck made a clunking noise and jerked. At which point the engine light turned on along with reduced speed message across the display screen. unable to pull over safely at the moment I had to proceed no faster than 25 MPH on US 54 hindering all traffic behind me. once safely pulled over I placed the truck in Park, then neutral , which made a loud clunking noise and absolutely no reverse. Truck towed to local dealership. Vehicle had been inspected by Dealer tech. Tech stated faulty valve body in the transmission.

Filed Jan 9, 2026 · Engine, Transmission · OH

Engine safety concern. Grinding and clunking while engine is running and gets worse under load or when accelerating. Have taken into dealer for service over 6 times. Recall service was performed and their fix was to change to a thicker oil but all that caused was worse fuel economy, more expensive oil changes, and the noises have become worse. Going back to dealer next week for another attempt. Have requested lemon replacement with GM but they are denying any issue.

Filed Dec 7, 2025 · Transmission · TX

hard/delayed shifting, slipping, shuddering , like rumble strips at certain speeds. Jerking, bucking, or significant delays when shifting gears. Shuddering/Vibration: A feeling like driving over rumble strips, especially at certain speeds and when warm

Filed Nov 18, 2025 · Transmission · TN

Hairline crack developed on the transmission cooling line at the connection of the thermal bypass block. After looking up it seems to be common. Yes, there have been user-reported issues with transmission cooler lines leaking or cracking on 2024 Chevrolet Silverado models equipped with the 3.0L Duramax diesel engine, including at or near the thermal bypass block connection. These reports primarily come from owner forums and appear to affect a subset of vehicles, often discovered during routine maintenance or after noticing fluid spots under the truck. Symptoms can include hard shifting, fluid seepage on the undercarriage, or low transmission fluid levels, with some cases progressing to require towing if not addressed early. For instance, multiple owners of 2024 Silverado 1500 models (including ZR2 trims with the LZ0 3.0L Duramax) have described leaks originating from the cooling line block or thermal bypass area next to the oil filter, sometimes involving hairline cracks in the lines themselves.  In one detailed account, a 2024 model with around 35,000 miles experienced fluid leaking from the cooling line block, leading to replacement of seals and the entire line assembly due to cracking discovered after initial repairs.  Similar problems have been noted on closely related 2023 models, where leaks at the thermal bypass valve necessitated replacing the valve, O-rings, and all cooler lines, with some users reporting hairline cracks as the root cause.  Parts like the lines have been on backorder in some cases, causing repair delays, and resolutions are typically covered under warranty (e.g., powertrain coverage up to 100,000 miles), though repeated visits to dealerships are common. These issues seem tied to the 10L80 10-speed transmission paired with the 3.0L Duramax, where the thermal bypass valve can contribute to overheating or fluid flow problems if faulty, potentially exacerbating line wear

Filed Oct 24, 2025 · Transmission · OH

8 Speed Transmission without any warning, started shaking and clunking and slipping while doing 55mph in traffic causing sudden loss of momentum. 8 speed transmission failure. Dealership says bad transmission control module and won’t inspect internal components. Chevy is still playing games with people with their defective 8 speed transmissions. They have not fixed all of their previous problems

Filed Jul 18, 2025 · Transmission · MS

Experience hard shifting into park from a stopped position a week or more prior to incident. While driving, several hard shifts were experienced which resulted in the vehicle unable to surpass 30 MPH. CEL illuminated displaying codes: P0747 and P0700. Suspected transmission Valve Body issue. Vehicle was towed to dealership that it was purchased from.

Filed Jun 25, 2025 · Engine · 200 miles · ME

The contact owns a 2024 Chevrolet Silverado 1500. The contact stated while driving 43-50 MPH, the vehicle hesitated, and the transmission shifted hard. There was an abnormal clunking sound coming from the vehicle. The engine warning light was periodically illuminated. The contact received notification of the federal safety agency Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The local dealer was contacted. The dealer was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 200. VIN tool confirms parts not available.

Filed Jun 5, 2025 · Transmission · AL

My Silverado has what seems to be a known issue with recent model Silverados which is a broken/blown valve body at the transmission. The week of the failure, my truck began having rough shifting from first to second gear first thing in the morning, but would be fine after that. Two days later this progressed to all of the gears and nearly stranded me and my kids on the interstate due to not being able to maintain speed. I got the truck to the dealership where they looked up diagnosis code and told me it was the valve body and it would require replacing. Unfortunately, the part is on national backorder with unknown delivery time. Looking online, it seems this is a known issue and parts seems to be months (6+) behind. I am stuck paying for a rental car that GM says I will get reimbursed for, but we will see. To complete the questions above, I did not notice any warning lights or notices until it failed.

Filed Mar 28, 2025 · Engine, Transmission · FL

Was pulling out onto the road from sitting at a traffic light, vehicle was going less than 25mph when the engine made a clunk trying to shift and the check engine light came on. Computer software indicated “limp mode with reduced acceleration activated.” Vehicle wouldn’t accelerate above 35mph, had to drive on major highway to get to dealership. Truck is only used as commuter vehicle hasn’t towed anything. Dealership indicated valve body transmission failed with vehicle only have 9k miles on it. Part is on back order as it is being manufactured due to installed faulty part, problem has been going on in 2023/2024 Chevy and gmc trucks since January 2024 without a recall put in place. Problem is being fixed after the part fails and the truck fails to run at optimal valves. According to forums software update were installed versus recalls to the actually valve body part being. I was sold a truck in sept 2024 with a faulty installed part versus it being fixed before it was purchased. This caused me to be stranded 1500 miles away from my home and we were not made aware of the know valve body transmission issue. The information was covered up versus being disclosed.

Filed Jan 27, 2025 · Engine · NY

When Driving my 2024 Chevy Silverado with 24,600 Miles on it this morning, i was on the New York State Thruway going highways speed (70MPH) when the truck Lost Power, and Shut completely off, I had a tractor trailer behind me and lucky my pick up truck was able to coast over the white line, if i would have been able to coast over the white line i would have been in a major accident. I attempted to start the truck up again and the truck would not turn over, i had sat there for about 25/30 Min trying to get the truck started and finally the truck turned over and i was able to continue on to work, While driving the truck had absolutely no power and the truck was sitting around 3K RPMs when going 66mph, the truck was hard shifting into gears as well. I arrived at work and i got to a parking space and all the sudden the truck shut off and wouldn't not start back up. Upon arriving to work i rolled down my window and heard a long banging noise coming from the engine Aswell as a whining noise. I attempted to start the truck up and you hit the start button the truck just keeps whining and never starts up. I was able to contact GM Roadside and have a tow truck come and pick the truck up and bring it back to the dealer. Im awaiting the dealer to contact me. Overall, i could have been in serious car accident for because the engine just shut off on the highway, this happened with no warning or anything, the check engine light was NOT on before this happened.