What 346 owners told NHTSA about the 2023 Chevrolet Silverado 1500 Ltd

Transmission Control Valve Body. known issue on the 10spd transmission. GM will not do a recall. my truck was in the shop for 5 weeks in March 2024. Coolant Control Valve. known issue on these vehicles. GM will not do a recall. my truck is currently on its 4th week in the shop. and they are telling me it's 2-6 months out for the part. GM is continuing to manufacture new vehicles while those who already own vehicles are stuck waiting on a backordered part.

NHTSA ODI 11641286

We were driving our truck with our family on vacation. We were going slowly entering the parking lot to our hotel when a sudden loud grinding noise caused our truck to shudder and shake. We stopped and got out and didn’t see that we ran over anything. We started to proceed and the sound was the same. We parked in a stall and left the vehicle overnight. No check engine lights were on. No warnings at all. It was Memorial Day weekend 2023. There were no dealerships open where we were vacationing, 3 hours from home. Very inconvenient. Later when the dealer looked at it, the thrust bearing was bad and the engine was shot. Needed a full replacement at 10,600 miles.

NHTSA ODI 11639187

Transmission seal failure caused fluid to leak, transfer case had metal present and had to be flushed, multiple electrical issues where there was no sound and buttons on back left of steering wheel wouldn't function, vehicle put itself in neutral when passing and gave a conditions not favorable for shift change when I tried to put it in park. Eventually put itself in park and I was able to get home. Dash went black, ticking sounds quickly escalated to the motor blowing thankfully close to a dealership on 1/2/2025. Still awaiting a timeframe or information on what will happen. Unable to attach video

NHTSA ODI 11639181

While attempting to pull out into traffic at a T intersection, the vehicle would not accelerate as I got into roadway and gave me a "Reduced Acceleration" notice. I was almost hit by a vehicle that was coming towards me. This has happened 3 times now. I have not taken it the dealer yet.

NHTSA ODI 11638811

I was going down the interstate and my car engine turned off and almost made me crashed into another car. Chevy dealership took it and after a month they said the engine is locked up so it needs a new engine now.

NHTSA ODI 11637646

2023 Silverado with 10 speed transmission. 20K miles. On 11/30 received "Reduced Power" message, quickly followed by "Service Transmission Now Unable to Shift Soon", which was quickly followed by "Service Transmission". CEL came on. Transmission was shifting erratically, and not shifting into higher gears. Clearly a safety concern. Dropped it off at a local dealer on 12/1. Dealer service advisor contacted me 12/12, saying they were finally able to diagnose the problem and the transmission needs a new valve body. However, the valve body is on back order and there is no estimated time for when it will be available. The internet is awash with stories of the same issue with GM's 10 speed transmission in the light duty pick up trucks, leaving owners waiting for weeks, even months before their vehicle is repaired.

NHTSA ODI 11630347

Vehicle was re-started after running into a store, vehicle made loud growling noise from engine compartment and Service Engine Soon light came on. Took truck to dealer for diagnosis and repairs. was called and informed That the Coolant control valve was defective and that NO parts were available at this time, and that the expected part arrival dat was the third week of January. When asked if the truck was drivable was told that it wasn't recommended due to engine overheating concern and vehicle going into LIMP mode and leaving me in an unsafe situation if traveling on a highway or at freeway speeds.

NHTSA ODI 11629021

The contact owns a 2023 Chevrolet Silverado 1500. The contact stated while driving approximately 70 MPH and hauling a small box trailer, the vehicle slid several times. There was no warning light illuminated. The contact pulled over to the side of the road temporarily and resumed driving; however, the failure recurred several times. The contact pulled over to the side of the road. The manufacturer was contacted and informed the contact that towing assistance could be provided for the vehicle but not for the box trailer. The contact decided to continue driving the vehicle to the residence while the manufacturer remained on the phone with the contact. The contact stated that upon test driving the vehicle the following day, the vehicle operated as needed. The vehicle was taken to the dealer, where it was inspected, and the dealer removed the valve body of the transmission per the manufacturers' instructions. The dealer then informed the contact that metal shavings were found in the transmission pan. The dealer replaced the transmission. The contact stated while driving at various speeds, the rear end of the vehicle continued to make an abnormal humming sound. The vehicle was taken back to the dealer, where it was test-driven, and the dealer determined that the rear end of the vehicle needed to be rebuilt. The vehicle was repaired. Additionally, the contact stated that while his wife was driving 40 MPH on a wet road, the vehicle inadvertently slid off the road and drove on the grassy area covered with snow. The contact's wife steered the vehicle and missed a ditch; however, the rear passenger's side of the vehicle and the rear passenger's side tire struck a pole. The air bags did not deploy. The driver did not sustain any injury. The driver exited and inspected the vehicle. The driver was able to continue driving. The dealer was notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 23,000.

NHTSA ODI 11629013

Vehicle goes into reduced power mode and prevents safe acceleration in traffic and is a major safety concern. The Coolant Control Valve is the issue which has been a problem in the Silverado for a few years. This part is also on national backorder.

NHTSA ODI 11628842

Truck started hesitating for no known reason. No check engine light, nothing. Shortly thereafter, truck stopped shifting after I pulled out into a very busy intersection. Would not move briefly. I quickly put it into park, then neutral, then drive again, and was able to limp out of the intersection, just missing oncoming vehicles. I was then able to barely limp to dealership. Check engine light finally came on just before I got there. They say defective transmission cooler seal and lines. I have no idea. Truck in shop for 5 weeks and no idea of when it will return. According to various Chevy/GMC forums, it's happening to others. Some have had entire transmission replaced in a car less than a year old. Not being able to exit an intersection is a problem.

NHTSA ODI 11608105

Automatic Transmission Valve Body Failure. It is available for inspection. Safety issue: Lost high gears and low gears while towing a camper trailer, speed limited. Dealer confirmed problem and ordered parts. No advanced notice of the problem. Transmission experienced a hard shift and check engine light and warning message appeared. Dealer reports new part GM Part #24047995 is unavailable nationwide due to so many other customers with same problem. No timeframe given of when a part could be available.

NHTSA ODI 11604066

Multiple random electrical issues, including, but not limited to: 1) "Service ESC" warning activates causing the truck to have greatly reduced speed and power. Extremely dangerous at expressway speeds in heavy traffic. 2) Electrical system & engine completely shuts down with no warning. Extremely dangerous for obvious reasons. Temporarily remedied by disconnecting/reconnecting battery, thus resetting the system. Problems have been confirmed by the dealer, Bomnin Chevrolet- Dadeland. Supposedly vehicle has been inspected by a GM "TAC" technician. Vehicle has been and is currently in the possession of the dealer off & on approaching 2 months with no resolution.

NHTSA ODI 11582761

The contact's husband owns a 2023 Chevrolet Silverado 1500. The contact stated that on several occasions while driving at approximately 60 MPH, and shifting gear, the vehicle lost motive power for 15-20 seconds. The Forward Collision Avoidance warning light was illuminated. On another occasion, while her husband was driving at an undisclosed speed, the driver assist function was activated, an error message was displayed, and the vehicle failed to operate as intended. The vehicle was taken to a dealer and the contact was informed that the transmission fluid needed to be flushed, and the TCM module needed to be updated. The vehicle was repaired, but the failure persisted. The manufacturer was notified of the failure. The failure mileage was 42,000.

NHTSA ODI 11581674

At approximately 9k mi the engine performance (2.7L MAX Turbo) started to become intermittent. I always record the fuel milage, and always drive the same way, to/from work. NOTE: Displayed mpg calculates within 1% of actual. We can assume the driving habits are identical each time. While driving on the same tank of fuel for a week at a time: one day heading to work the indicated mpg might be 17 mpg. Driving home, about 10 minutes into the drive, it might increase 25 mpg. The following day it could be the same 17/25 mpg or it might be 25/17. The weather is somewhat dependent, whereas around =<43F the 17 mpg is almost a guarantee. While the indicated lower mpg is displayed, a direct lack of engine power is noticeable. The accelerator is dangerously non-responsive, all the while of pressing the pedal >3/4 to the floor. There is also no downshifting from the transmission whatsoever. To make the engine respond to change, the accelerator must be fully pressed to the floor, forcing the transmission into a lower gear and causing the engine to 'wake up'. When the mpg is above 20 or 21 mpg, (and temperatures >50F) the engine performs normally, where gradual accelerations to the pedal increase the engine speeds and down shift as expected. I have contacted GM through the 'MyCheverlot' app a couple of times, and have taken the truck to the dealer twice for this. Both times from the dealer it was stated that since the engine light was not on and no codes were stored, there was nothing that could be done. The dealer installed a software update and sent me on my way. Lastly, the 4WD is now making a grinding/rubbing noise, since the software update and overcomes the engine power while making turns from a stopped position. If no acceleration is applied, the truck will come to a rapid complete stop if rolling <10 mph. Truck is a LEMON!!

NHTSA ODI 11579816

On first start up when put truck in drive and give gas when it shifts from 1st gear to 2nd gear there is a big hesitation when trying to shift and rpm’s revs up then it goes into 2nd gear. This has been verified by the dealers service advisor. The service advisor says they have no service bulletin on this problem so they have no solution for it at this time. This has been happening since August 3 2023 off and on until today. I have many recording of this happening. The service adviser has listened to several of them.

NHTSA ODI 11576882

When accelerating, the transmission is having issues changing gears. When the truck is trying to change gears, there is a tugging type of feeling. We have not taken the vehicle to the dealer, but we have seen that other similar vehicles are having the same issue. No warning lamps or messages appear.

NHTSA ODI 11574693

The transmission has a shudder during gear change and at certain speeds. First noted to dealer at 7,500 miles and they could not duplicate. At 15,000 it is worse, they confirmed the issue but had no fix. New truck, they want me to just accept the problem for the moment and keep driving it. Not happy, distracting, wonder about damage being caused, and long-term impact. Will it quit on trip, middle of the night, etc.?

NHTSA ODI 11571005

What component or system failed or malfunctioned, and is it available for inspection upon request? The transmission "shifter" has a Parking switch on top of the shifter. Pushing the shifter full forward results in the transmission being in REVERSE. Vehicles have had full forward result in PARK for as long as the automatic transmission has been around, creating a dangerous conflict between muscle memory and function. There have been two close-calls where my mind has considered it to be in PARK and when letting off the brake, the truck began moving in reverse. Luckily, I would have only hit a parked car but if there was a person behind me? Things could turn bad, quickly. Demonstration: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11564173

I am writing to bring to your attention a recurring issue with my recently purchased 2023 Chevrolet Silverado, documented in detail here: [XXX] . Despite the evidence presented in the document and my personal experience, Chevrolet claims there is no known issue with my vehicle. The persistent problem involves a front-end squeak chirp, which significantly impacts the driving experience. There is less than 7000 miles on my new 2023 Silverado. I am reaching out to seek your assistance in addressing this matter, as it appears to be a broader concern affecting multiple Silverado models. I believe your involvement can help ensure that both my specific case and the larger issue are thoroughly investigated, and appropriate actions are taken to rectify these ongoing problems. Your prompt attention to this matter is greatly appreciated, and I look forward to a resolution that ensures the safety and performance of my vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11559244

2023 Silverado 1500 3.0 Duramax. Transmission failure and engine overheating at 5k miles. I was towing a trailer when the 1st transmission failure occurred. The engine shut off, and said shift to N to start while coasting with loss of power braking. I was able to get started but transmission would slip when shifting above 1st gear. I had to tow to the nearest level point to safely park the vehicle, for fear of rolling backwards down 8% grade. At that point the computer was showing engine overheat loss of power warnings. GM roadside assistance towed to nearest dealer, refilled transmission with fluid, and put me back on the road for it to fail again in traffic (loss of power / unable to move). I have now been without vehicle going on 30 days and worry there is more wrong with the vehicle than just a blown transmission (latest GM diagnosis with no repair eta). For a few hours prior to failure I noticed what seemed like the transmission hunting for gears at lower speeds (0-25) with hesitation. Could have been slipping. And also noticed strange / louder than usual turbo noises. I worry the system is generating too much pressure or has mixed oil with coolant somewhere, based on finding atf, coolant, and engine oil near the overflow and all over the bottom of the vehicle. GM support has been atrocious and someone should step in.

NHTSA ODI 11552032

We purchased a new 2023 Chevy Silverado in approximately January 2023. The onset of the problems with the new truck was Friday, August 4, 2023. The engine light came on, skipping occurred when accelerating - powertrain issues. While driving at various speeds, the vehicle hesitated and was jerking when shifting between the first and second gear. No warning lights were illuminated. Then after arriving home, the truck cut off and I attempted to re-start the car without success. Waited for some time to start the truck, but it would not start. Attempted to start again after several hours. Did not start until the next morning and was able to drive the vehicle to the Chevy dealership service department, The service department kept the vehicle from August 4, 2023, to August 10, 2023. We were not provided with another vehicle, while they worked on mine. The second time occurred 10 days after picking the vehicle up from the service department. Monday, August 21, 2023, to PRESENT. Same issues with the truck continued. This issue has caused a major inconvenience. Not only are we still making payments on the vehicle. We have not been given a date of when the vehicle issue will be resolved. The parts needed are on back order. The truck has been in the dealership service department for 22 days as of 09/05/23.

NHTSA ODI 11542689

The contact owns a 2023 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, the vehicle hesitated and was jerking when shifting between the first and second gear. No warning lights were illuminated. The vehicle was taken to a local dealer, where it was diagnosed that the transmission control module (TCM) needed to be reset. The vehicle was repaired; however, the contact stated that the failure reoccurred while driving into his driveway, with the vehicle lunging forward. The vehicle was then taken to Murdock Chevrolet (2375 S 625 W, Woods Cross, UT 84010), where the failure could not be duplicated. The vehicle was not repaired and had remained at the local dealer. The manufacturer was made aware of the failure. The approximate failure mileage was 1,000. The VIN was not available. The contact has refused to take the vehicle home until the dealer can provide them with a remedy and repair for the failure.

NHTSA ODI 11514463