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

Vehicle started making an odd noise and was immediately taken to the dealer. Engine light did come on after the noise started. Dealer confirmed that there was an issue with the camshaft/lifters and that they have had to perform this repairs to 8 other trucks with the same 6.2L engine. (Original repair bill is attached). Dealer performs the repairs, takes the truck for a test drive and within a few miles the engine completely seizes up stranding the truck in the middle of the road. They believe it was a separate issue that caused the engine to seize up and now after 12k of repairs I will also need to purchase a completely new engine. Currently waiting on the price and availability of a new engine but was told I may have to wait a long time since this is such a common issue there aren’t many available. Would be more than happy to share additional Info as it becomes available. Thanks, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11640879

Engine failure while driving without warning (lights)which caused catastrophic damage to Engine and needed to be replaced

NHTSA ODI 11639836

Catastrophic engine failure , heard a ticking called dealer where i purchased truck new , was told not to drive it . No warning..

NHTSA ODI 11639704

The motor of our vehicle failed while driving on the interstate. The vehicle is at a dealership for repairs and should be available for inspection. With little to no warning our truck quickly went from 70 MPH to completely shut down. We had to go from the left lane on the interstate to the shoulder. In the process we were very close to a collision. We were also hauling our camper (2023 Forest River R-Pod 153, which has a dry weight of 3,421 lbs and we had no water in our fresh/grey/or black tanks). When we merged into the right lane our truck was going so slowly on the interstate that we were almost hit and honked at before we could get to the shoulder safely. The problem was confirmed by the dealership that is working on it. The motor spun 4 rod bearings and it was a total motor failure. The vehicle was/is still under warranty. The manufacturer, I would assume, has inspected it as we are receiving a full motor replacement. That motor has been and continues to be on back order with no ETA for 2 months now. There were no warnings in how the truck was running. There were no warnings on the dash, warning lights, or any indication that our truck was going to break down.

NHTSA ODI 11639292

The contact owns a 2023 Chevrolet Silverado 1500. The contact stated while driving 65 MPH, the message that the vehicle was in neutral was displayed. The contact pulled over to the side of the road, turned off, and restarted the vehicle however, the gear shifter failed to respond as needed. The vehicle was towed by AAA to the dealer and the dealer was contacted. The vehicle was diagnosed, and the contact was informed that the engine, the radiator, and the oil cooling lines needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 45,000.

NHTSA ODI 11639397

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

[XXX] I was heading home from work, driving on [XXX] near [XXX] 2023 Chevy Silverado 1500 ZR2 broke down. I lost all power in my vehicle, besides brakes and steering, and had to coast into the breakdown lane. After restarting my truck, I was able to drive another mile on the highway until I lost all power again on the off-ramp. My truck was broke down, halfway in the road, and I could not start it back up to try and move it. I remained there in the subfreezing temperatures with no heat in my truck for over 1.5 hours waiting for a tow through OnStar that never showed. A state trooper eventually pulled behind me because I was blocking traffic and then proceeded to call a different tow company which arrived about 15 minutes after he called. Since that day, my truck has been at Colonial Chevrolet in New london CT waiting for a “nationally backordered” 6.2L engine. 53 days without my truck that I use for me and my business partner’s construction company, and no ETA for when the new engine will be arriving. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11639229

I was pulling into my neighborhood when my engine started rapidly thumping the higher the rpm’s got. I was able to get it to my local Chevrolet dealership. Flaherty Chevrolet in Brandenburg, Ky. They told me it had catastrophic engine failure. I’m currently waiting for a new engine replacement. They’re trying to find a new one, but are having no luck.

NHTSA ODI 11638698

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

While driving down the highway, a message popped up stating “not suitable to shift” and I lost all acceleration and could only coast. Luckily was able to coast over to the shoulder, where attempts were made to shut down and restart vehicle. Second message came up stating reducing features to save battery. Was unable to restart and a tow was requested. Dealership reported it was unknown why or what caused it but engine was locked up. Engine only had 19k on it with just me as the owner.when purchased brand new 17 months prior.

NHTSA ODI 11638432

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

My trucks engine failed when I was driving on the highway with my family in the vehicle. The truck lost power and struggled to get off on the side of the road. Truck has been at the dealership since 25 Nov 2024 with still no diagnostics. GM is claiming they will not replace due to lift on the truck which has nothing to do with all these engine failures. Last contact from dealership was 27 Dec 2024.

NHTSA ODI 11637842

Motor seized while driving on freeway at 65 Mph. Coasted to the media on the freeway in the middle of a dividing highway. The highway patrol stopped and then left feeling unsafe. Dealer would not tear down without a $3000 release from me for labor, if not covered under warranty. This is now a federal investigation with this motor and over 86k complaints. I would also like to add, this happened to a new truck my son bought in 2021 Silverado trail boss so GM new about these motors and are still selling them!!!

NHTSA ODI 11637510

Faulty coolant control valve causing reduced engine power at highway speeds and reduced acceleration caused unsafe operation on highway. Was unable to safely maneuver to right lane on highway to allow faster traveling traffic to pass. Fortunately was only about 5 miles from home and was able to operate the vehicle in "limp" mode after traffic cleared. There was no warning just during operation check engine light and reduced engine power displayed on the drivers information center. The vehicle is available for inspection with the defective part because GM can't source a replacement despite occurring nearly eight weeks ago. GM has authorized the warranty repair and is currently at a Chevrolet franchise dealership awaiting repair parts. The manufacture is aware of the issue and has accepted a manufacture engine part is the cause of the issue.

NHTSA ODI 11637105

Engine seized at 330 miles. I’ve recently seen the investigation into crank bearing failure on the L87. We upfit new vehicles. This was a test truck. We pulled oil from another identical chassis with 10 miles on it and sent it in for testing to a 3rd party. At 100C/212F the viscosity was under 7 and it should be 20. It is our belief that GM has faulty bulk oil they’re putting in new vehicles.

NHTSA ODI 11636881

There were no symptoms prior to the engine failure. On January 14th, 2025 while driving 58 miles per hour heard a sound that sounded like a slap on the back window. After the slap sound I noticed the engine was not running as normal. There was also a sound coming from the engine like metal rattling around. A few minutes later the check engine light appeared in the instrument panel. Had the vehicle towed to the nearest GM dealership and was informed that the thrust bearing went out which may have caused damage to the crankshaft.

NHTSA ODI 11636439

I was driving and received a check engine light with “Service ESC” and traction control was disabled. Performed diagnostics and found P0300, P0304 and P0204 all relating to cylinder 4 misfire and injector issues on cylinder 4. Truck has just over 47,000 miles and may be related to the lifter issues that plague this engine design.

NHTSA ODI 11633257

The contact owns a 2023 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the vehicle lost motive power and decelerated to 20 MPH. The check engine warning light illuminated with the messages, “Reduced Acceleration – Drive with Care/Service Emission Systems” and “See Owner’s Manual” displayed. The contact drove the vehicle to the residence and the vehicle was then towed to the to a local dealer to be diagnosed. The contact was informed that the wiring harness was faulty and needed to be replaced. The vehicle was not repaired. The contact linked the failure to Customer Satisfaction Program: N222391510. The manufacturer was notified of the failure. The approximate failure mileage was 47,295.

NHTSA ODI 11629296

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

Within weeks of buying the truck the Auto STOP/START quit working. I never gave it much thought until after a service visit and it was again working. I asked the dealer and they said the battery voltage dropped below a set level, turning off the Auto STOP/START. It quit again days later and has never worked again. There is no apparent reset. My battery voltage is normal, I have a REDTIGER F7N 4K Dual Dash Cam running 24/7 but it is drawing 4.5 to 5 watts; the car is rarely left parked for more than a day. I was initially bothered that there was no On/Off for the Auto STOP/START but I am even more frustrated that it is no longer working and no apparent reset short of taking the truck to the dealer for service.

NHTSA ODI 11620030

I have found between the last two oil changes, I have had to add 1-1/2 to 2 quarts of oil. I first thought that maybe the oil was not refilled fully but after the second time I asked the dealer about this and they said that the engine may need up to 2 quarts of oil added between oil changes. SERIOUSLY?! I cannot believe this is normal for a new truck with less than 30,000 miles. There is no leaks in my driveway, no obvious exhaust smoke.

NHTSA ODI 11620031

On June 16, 2024, my vehicle stalled on a 70 mph interstate. I was able to get to the side and attempt to restart. After ten minutes, the vehicle restarted and I received a message of "Low Battery". I drove it immediately to the dealership and advised service. The next day I called the dealership for a status update and was advised the engine seized. The vehicle had 3,212 miles on it at the time. The dealership ultimately received permission to replace the engine which took about three and a half weeks. The vehicle is simply not the same and has several issues since. One was a No Start and No Power.

NHTSA ODI 11607753

at about 20k miles the valve body went out. When coming off the brake and pressing the gas the engine was jerking. The engine light came on and then started to downshift. The truck was towed to the dealer and they said a few days later it was the valve body. All the miles of the truck were highway miles and no towing was ever done on this truck.

NHTSA ODI 11605434