2024 Chevrolet Silverado 3500

NHTSA Vehicle Safety Complaint I am reporting a serious transmission defect in my 2024 Chevrolet Silverado 3500HD LT that creates a high risk of sudden power loss, erratic shifting, or loss of control while driving. Vehicle Details: - Make/Model/Year: Chevrolet Silverado 3500HD LT, 2024 - VIN: 2GC4YTEYXR1263768 - Engine: 6.6L Duramax diesel - Transmission: 10-speed Allison (10L1000) - Mileage at diagnosis: ~46,000 miles - Title: Rebuilt (warranty denied due to branding) Defect Description: The transmission shifts normally when cold (fluid below ~138°F). Once warm (during normal driving), it fails to upshift properly in gears 5-8: holds lower gears, causes high RPMs (3,000+), delays shifts excessively, or refuses to shift. When shifts occur, they are hard and jerky. Automatic (Drive) mode is affected; manual/L mode works normally as a workaround. No warning lights appeared initially, but the issue has worsened and is now frequent at operating temperature. Diagnosis: On January 28, 2026, Seminole GM (1405 N Milt Phillips, Seminole, OK 74868; 405-382-6130) diagnosed a defective valve body requiring replacement. Quote: - Valve Body Control Module (Part #24065357): $687.48 - Transmission Fluid (12 qt @ $10.92): $131.04 - Labor (diagnosis + pan/filter/relearn): $805.50 - Supplies/taxes: ~$140 - Total: $1,763.94 Dealer confirmed this is a common issue; photos of quote available for upload. Safety Risks: At highway speeds, delayed/no upshifts can cause: - Sudden inability to accelerate (merging, passing, hills) - Harsh engagement leading to wheel slip or loss of control - Potential limp mode entry, stranding in low gears This intermittent warm-only failure is unpredictable and dangerous. Context: This matches widespread complaints on 2023-2025 GM HD trucks with the 10L1000 (forums: DuramaxForum, Reddit r/Duramax/r/Silverado, GM-Trucks.com), involving valve body wear/pressure loss. Earlier years had related recalls (e.g., NHTSA 24V-797 for valve issues),

Email Subject I am reporting a serious safety-related defect involving sudden and complete vehicle shutdown while driving in a 2024 Chevrolet Silverado EV RST. Component/System Involved: The failure appears related to the 12-volt electrical system and associated vehicle control electronics. When the vehicle detects the 12V battery as dead or critically low, it immediately disables propulsion and control systems. The exact failed component is UNKNOWN. The vehicle is available for inspection upon request. Incident Description: This failure has occurred twice under similar conditions (ambient temperature approximately 25°F). On November 28, 2024 and again on January 2, 2026, after driving approximately two blocks at low residential speeds, the vehicle abruptly and completely shut down while in motion. In both incidents, the shutdown was immediate, without warning, and accompanied by a loud thud and an extremely abrupt stop. Safety Risk: In both incidents, the vehicle became completely immobilized in the roadway. I was unable to steer to the side of the road, restart the vehicle, or shift it into gear to move it out of traffic. This created a significant risk of collision. A similar failure at highway speeds could result in a severe or fatal crash. Warnings or Prior Symptoms: No warning lamps, messages, alerts, or other symptoms appeared prior to either shutdown. Problem Confirmation or Reproduction: The issue has occurred twice under cold-weather conditions. Inspections: After the first incident, the 12V battery was inspected and no issues were found. Following the second incident, the vehicle is currently being inspected at a Chevrolet dealership. No police or insurance inspections were performed. This behavior suggests the vehicle lacks a fail-safe or degraded-operation mode for 12V system failure and instead performs an immediate shutdown while in motion, which may represent a serious safety defect warranting investigation.

When pulling my trailer with my 2024 chevy 3500, I get the following alert displayed on my screen periodically: Trailer Brakes Disabled Service Required. The trailer brakes stop working on my 16000lb trailer and I need to pull off the road and shut off the truck, and then restart it to get my brakes working again. The dealer replaced the brake controller in the truck, but I still get the message. I towed this trailer across country 2 times in my 2020 chevy without a problem. I have hydrastar brakes on my 2022 keystone Montana. GM said it's a problem with the trailer. Hydrastar said they have had numerous reports from 2024 GM truck owners. I am bringing it back to the GM dealer Monday for an oil change but I was informed they have no further information to guide them Please assist.

I was driving on the interstate at around 65mph. Towing my fifth wheel. Transmission started shifting hard with a loud bang that sounded like we hit a huge pothole. A message popped up in the screen indicating “Reduced acceleration, drive with caution”. The transmission seems to be stuck in gear as we exited the highway. Check engine light was on. Came to a stop at a stop sign and barely had enough power to pull into a parking lot. We had the truck towed to a nearby dealership. Fault codes P0700 and P0747 were present. Service advisor said valve body would have to be rebuilt. It’s been 2 weeks and the valve body cover plate is still “backordered” with no estimated in stock date.

The contact owns a 2024 Chevrolet Silverado 3500. The contact stated that while driving at various speeds, the vehicle hesitated, and the transmission failed to properly shift. The vehicle was taken to the local dealer, who discovered metal shavings inside the fuel filter and diagnosed that the High-Pressure Fuel Pump was faulty and needed to be replaced. The high-pressure fuel pump was replaced, and the vehicle was repaired. Later, while hauling a trailer on the highway, the vehicle unexpectedly stalled. The vehicle was towed to the dealer, who diagnosed that the fuel pump control module had failed and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 19,000.

The contact owns a 2024 Chevrolet Silverado 3500. The contact stated that while driving 30 MPH and attempting to depress the brake pedal, the message “Trailer Brakes Disabled” was displayed. A dealer was contacted. The vehicle was taken to the dealer, and the contact was informed the contact the vehicle was operating as designed, and that neither the vehicle nor the trailer would be diagnosed. The vehicle was not repaired. The manufacturer was notified of the failure and opened a case. The approximate failure mileage was 12,000.

I keep getting a chunking noise coming from the rear of vehicle. Twice I have taking in to the dealer and I was told this condition may be caused by movement between the anchor plate and axle assembly. They have re-torqueing the joints of the leaf springs assembly. it coming loose. It has happened after 4,000 miles. This tells me that it can come loose while I am driving! GM has a service document ID: 5501065. It has been happening since 2020!