2023 Chevrolet Suburban 1500

On January 16, 2025, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE25001 after receiving complaints and field reports concerning engine failures in MY2019-2024 GM’s full-size truck and SUV T1XX platform equipped with the L87 6.2L V8 engine. These complainants alleged engine bearing failures resulting in knocking and growling noises from the engine’s bottom end and in some cases more severe consequences such as broken connecting rods leading to engine damage, or engine failure. If the engine fails during vehicle operation, the vehicle will lose propulsion, increasing the risk of a crash. On April 24, 2025, GM issued recall 25V-274 to address the concern with L87 engines produced between March 1, 2021, and May 31, 2024.  GM cited the root cause as a supplier manufacturing and quality issues. GM’s  recall remedy will be either an oil change to an oil with a different viscosity or engine replacement depending on the results of the remedy inspection procedure. To date, ODI has received 1,157 allegations of engine bearing failure. GM submitted 55,464 reports in total, with 29,752 unique VINs. ODI continues to receive allegations of L87 engine failures which fall outside of the scope of recall 25V-274. Based on GM’s recall, ODI will close this PE. NHTSA will continue to investigate complaints of engine failure outside the scope of recall 25V-274 as part ofEngineering Analysis (EA25007). To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.

1/10/25 Complete braking system failure, could no brake, could not use emergency brake. Almost crashed into my garage -Chevy Service Dept. replaced Electronic Braking Control Module 1/24/25 Complete braking system failure, could no brake, could not use emergency brake -Chevy Service Dept. replaced battery 2/1/25 Car shaking terribly, my kids screaming we were going to “explode” , car smoking, white smoke coming from exhaust -Chevy Service Dept. states there is an engine issue, they will need to break down and replace parts / repair

NHTSA ID

11641893

Incident

Feb 1, 2025

Wife is RN at a trauma hospital going to work in the morning on a busy highway. While in front of Hospital truck started to indicate to hit starter button. Truck was already running! Wife stopped at red light. Truck stopped running would not start. Stuck in middle of morning rush hour traffic had to have truck towed to dealership. At the dealership they indicated they found metal parts in the oil pan. They indicated a further look into the engine indicated it was beyond repair and had to be replaced. Truck only had 42k miles on it. They stated they had another one same situation in the shop as well and that it would take several weeks to repair. I have learned that this is a major problem with this make and model and engine. Engine quit with no warning in middle of major highway. Thank god not in an intersection or freeway.

NHTSA ID

11641302

Incident

Jan 9, 2025

I was driving the vehicle at approximately 45 mph when the vehicle suddenly had no engine power. There were no warning signals or symptoms of an issue that would indicate there was a problem, but the dashboard told me the vehicle needed a restart. I was able to pull the vehicle out of traffic at a cross street and coast to a stop in a parking lot. Had I not been where I was at the moment when the engine failed, or had there been oncoming traffic that would have required me to stop coasting, I would not have been able to pull safely out of traffic. The vehicle was towed to the dealer where it was purchased. They told me the next day that is was an internal engine failure.

NHTSA ID

11640343

Incident

Jan 28, 2025

On April 7th 2024 we were traveling on vacation 2 1/2 hours from home and our vehicle started making a ticking noise and traction control, engine light, service emissions, and front collision warning all came on. It was idling very rough. We had to stop for the night with our kids and take it to the closest dealer the next morning. They diagnosed the car and confirmed that the lifters needed repair. We had to leave our vehicle and get a rental to make it back home. The dealer made repairs and sent vehicle back to us. Fast forward to 1/15/25 I was on the way to work and the same thing started happening. I then had to tow the vehicle to the dealership and they have diagnosed it with the same issue on the other side of the engine. As a brand new vehicle this should not be happening. Each time we were stranded with kids and without a vehicle for a long period of time.

NHTSA ID

11637730

Incident

Apr 7, 2024

Engine died without warning on interstate. Vehicle was towed to Chevrolet dealer where defective rod bearings were found. Engine was replaced by dealer.

NHTSA ID

11637479

Incident

Oct 13, 2024

While driving my family home from our christmas vacation on the Garden State Parkway (NJ) the engine shut off and would not restart. This happened on a stretch of the highway with no shoulder while traveling at 65mph. Thankfully we were able to coast far enough to a section of highway with a shoulder. This incident left my [XXX] , [XXX] , my wife and I and our dog stranded in the freezing cold 100 miles from home. After a stressful next few days the Chevrolet dealership diagnosed it as blown bearings in the motor. It has now been over three weeks and no word from GM when a new motor will be available. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11636860

Incident

Dec 27, 2024

When traveling at highway speeds our vehicle suddenly lost all engine power. Driving in the passing lane of [XXX] at 75 mph our 2023 Chevrolet suburban RST 6.2 lost all engine power and went into neutral. We were barely able to make it over to the right breakdown lane without getting hit and making it with no power. We were stranded on the busy interstate for three hours with my wife and three young kids in a very dangerous location. They were scared and because we barely made it into the breakdown lane and so close to speeding traffic had to stand outside of the vehicle close to the woods further from dangerous traffic. The Suburban was flatbedded to nearest Chevrolet dealer where we were told the engine was seized and would need to be totally replaced. We were lucky to be alive but now stranded 1000 miles away from home as we were returning from a vacation in Florida. The sudden lose of all engine power traveling on the highway with our entire family was both scary and dangerous. The suburban has now been in the shop for three weeks with no date in sight to be ready and 1000 miles away. This was a truly dangerous situation and thankfully we came out unscathed but I fear someone else may experience the same type of failure and not be so lucky. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11636839

Incident

Jan 2, 2025

On January 1st driving east bound on road 520 in central florida. I was driving around 65mph when the vehicle suddenly shut off. The displayed showed a warning saying that something of the sort that I needed to press the brake to start the engine even though I was driving normally. I had to coast to the side of the road and I pressed the brake. once the brake was engaged the vehicle immediately went to park and will not start. I press the ingition button and the screen would go blank and no sound or warnings were displayed. I had to call the police to provide a safety as the vehicle was in a very dangerous area and all my family was on the vehicle. the police laid down flares and I contacted a tow truck using onstar. Onstar was unable to communicate with the vehicle to diagnosed the issue and no warnings or errors were displaying. The vehicle was towed to Carl Black Chevrolet of Orlando Florida. The dealer stated that the engine is locked (L87) and was not able to turn, therefore the vehicle does not start. The dealership technicians have informed that the vehicle needs a new engine and GM needs to approved, the vehicle is still under warranty and I've contact GM and until today, 17 days later, GM has not responded or allowed the dealership to fix my vehicle.

NHTSA ID

11636670

Incident

Jan 1, 2025

This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently investigating.

This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.

PI to help diagnose A/C concern

• Improves transmission diagnostic software. • Reduces unnecessary check engine light activations.

This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.

This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. Engineering is working on a new HVAC door seal material to correct the noise.