2023 GMC Sierra 1500

The Office of Defects Investigation (ODI) has received 36 Vehicle Owner Questionnaires (VOQs) alleging engine failure in vehicles subject to Recall 25V274. In each VOQ, the engine had the recall remedy completed prior to the reported failure incident. Recall 25V-274 addresses vehicles equipped with a L87 6.2L V8 gas engine that experienced engine damage or failure. Recall 25V-274’s remedy includes an engine inspection.  Based on the results of the inspection the vehicle will receive an oil change to a higher viscosity oil or an engine replacement.  The complaints received allege failures of both remedies. ODI is opening this Recall Query (RQ) to assess the adequacy of the remedy for Recall 25V-274. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

The Office of Defects Investigation (ODI) has received 1,157 reports of engine bearing failure failures in the L87 6.2L engine produced by General Motors (GM). Of the 1,157 reports received, 173 are outside of the scope of recall 25V-274. These engines are installed in Model Years (MY) 2019–2024 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2021-2024MY Chevrolet Suburban and Tahoe, GMC Yukon/Yukon XL, and Cadillac Escalade/Escalade ESV vehicles. The subject engine failures were investigated as part of a Preliminary Evaluation (PE25001).  GM determined that these engine failures were due to multiple supplier manufacturing and quality issues. GM issued recall 25V-274 to address the supplier manufacturing and quality issues produced between March 1, 2021, and May 31, 2024. Based on the issuance of recall 25V-274, NHTSA has closed PE25001. ODI continues to receive a significant number of reports of engine failure in vehicles outside the scope of 25V-274.  This presents a potential safety risk that warrants further investigation.  ODI is opening this Engineering Analysis (EA) to further evaluate the scope and severity of the potential problem and to fully assess the potential safety-related issues of vehicles built outside the recall scope. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

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.

The OnStar module in the truck is broke it affects all communications. The truck has including things like let me know what the speed limit is. It happened after they did a software update, which seems a little fishy because there was nothing wrong with it before I understand. Some people were having problems with this module, causing their batteries to die, but now I’m the one having issues and they won’t seem to fix it unless I pay them $900.

NHTSA ID

11756360

Incident

May 28, 2026

My truck threw the code p0747 for fail valve body. When I do my research its a common problem. GM is stating my truck isnt covered.

NHTSA ID

11755890

Incident

Jul 31, 2026

I started to notice detached broken plastic pieces behind the upper grill housing. I notified the dealer, and in the meantime of trying to figure out what to do, the upper grill housing came detached when I was driving down the highway and flew up and back onto the highway. Sounds similar to safety recall N242490120, which was for 2022 model year trucks. Not sure why this stopped at 2022, but it happed on my 2023.

NHTSA ID

11755830

Incident

Aug 7, 2026

My 2023 GNC Sierra 1500 has experienced a recurring electrical and safety-related malfunction on multiple occasions while driving. The dashboard and warning lights intermittently flash on, and off and numerous warning messages appear simultaneously. During previous occurrences, warnings included power steering service, safety restraint system, check engine and transmission related messages, including a message instructing me to pull over and shut the vehicle off. During one occurrence, the electric power steering assist stopped working while I was driving. The vehicle was taken to an authorized GMC dealership multiple times while under the factory warranty. The dealer replaced the Brake System Control Module and performed vehicle-wide software/programming updates. When the problem continued, the dealer contacted GM Technical Assistance. The Dealer subsequently diagnosed an intermittent open circuit involving the electric power steering rack-and-pinion/steering gear assembly and replaced the complete steering gear assembly. Despite these repairs, the malfunction has occurred again, during another occurrence while driving on the freeway, the dashboard flashed on and off and multiple warning lights and messages repeatedly appeared, similar to the condition that occurred before the steering gear was replaced. The vehicle currently has approximately 55,000 miles. The condition remains intermittent despite multiple repair attempts. I am concerned that this recuring electrical or vehicle communication failure could again cause loss of power steering assistance or affect other safety-related vehicle systems while driving.

NHTSA ID

11755734

Incident

Aug 3, 2026

While driving southbound on Interstate 95 in Florida, the front upper grille molding/deflector completely detached from my 2023 GMC Sierra 1500 SLE at highway speed and separated from the vehicle, creating a potential road hazard for other motorists. Prior to the complete separation, I noticed that the upper grille molding was becoming loose and lifting away from the vehicle. I stopped and photographed the component and its attachment areas. The photographs show failed/broken attachment points while the molding was still partially attached to the truck. Later, while driving on I-95, the remaining attachments failed and the entire molding separated from the vehicle. The part could not safely be recovered from the interstate. The vehicle recently underwent dealer service involving the active grille shutter/damper area near this component. I cannot determine whether that service contributed to the failure, so I am reporting it as part of the vehicle's recent service history rather than asserting it as the cause. I subsequently became aware that NHTSA Recall 25V-060 / GM Recall N242490120 addresses separation of a front upper grille deflector on certain GMC Sierra 1500 vehicles due to fractured attachment points. My vehicle is a 2023 model and does not presently appear to be included in that recall. Because my vehicle experienced a similar failure mode resulting in the exterior component completely separating at highway speed, I am submitting this complaint so NHTSA can determine whether this condition may extend beyond the vehicles currently covered by the recall. Photographs documenting the component and failed attachment areas before its complete separation are available.

NHTSA ID

11755702

Incident

Aug 8, 2026

Vehicle: 2023 GMC Sierra 1500 SLE VIN: [XXX] While driving southbound on [XXX] near exit [XXX], the front upper grille molding/deflector completely detached from my 2023 GMC Sierra 1500 SLE at highway speed and separated from the vehicle, creating a potential road hazard for other motorists. Prior to the complete separation, I noticed that the upper grille molding was becoming loose and lifting away from the vehicle. I stopped and photographed the component and its attachment areas. The photographs show failed/broken attachment points while the molding was still partially attached to the truck. Later, while driving on [XXX] to work, the remaining attachments failed and the entire molding separated from the vehicle. The part could not safely be recovered from the interstate. The vehicle recently underwent dealer service involving the active grille shutter/damper area near this component. I cannot determine whether that service contributed to the failure, so I am reporting it as part of the vehicle's recent service history rather than asserting it as the cause. I subsequently became aware that NHTSA Recall 25V-060 / GM Recall N242490120 addresses separation of a front upper grille deflector on certain GMC Sierra 1500 vehicles due to fractured attachment points. My vehicle is a 2023 model and does not presently appear to be included in that recall. Because my vehicle experienced a similar failure mode resulting in the exterior component completely separating at highway speed, I am submitting this complaint so NHTSA can determine whether this condition may extend beyond the vehicles currently covered by the recall. Photographs documenting the component and failed attachment areas before its complete separation are available. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11755700

Incident

Aug 8, 2026

While driving my 2023 GMC Sierra on the highway at highway speeds, a piece of the front grille suddenly detached and flew off the vehicle. There was no prior accident, impact, or external damage to the grille; the part failed and unclipped on its own due to defective manufacturing or weak retaining clips. This creates a severe safety hazard as the flying debris could have struck the windshield of the vehicles traveling behind me, potentially causing a major accident. I am aware that the 2022 GMC Sierra has an active recall (N242490120) for this exact same issue, yet GM is refusing to cover this 2023 model under warranty or recall despite presenting identical component failure.

NHTSA ID

11755666

Incident

Jul 27, 2026

- vehicle started misfiring, ECM, valve timing code, throttle system code, data system, gateway, module,. Vehicle is available and currently at the GMC dealership for continued diagnostic. -this happened on the freeway and out of nowhere the vehicle started shaking, rough, losing power and acceleration, I had to cut someone off on the freeway just to get over to the right shoulder and turned off the vehicle called a tow truck and haven’t been able to use the vehicle since. Vehicle is unable to be driven due to safety issues of increased acceleration and loss of power, intense shaking. -the vehicle is at the dealership now, prior there was a diagnostic performed by a different dealer, and it has been confirmed. -the vehicle is at the GMC dealership now. -ECM check engine light came on prior to the vehicle misfiring and other codes coming up.

NHTSA ID

11755389

Incident

Feb 3, 2026

General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.

Certain vehicles may have a condition in which the Engine Control Module (ECM) does not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.

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.

This Preliminary information communicates to the technician on the a potential cause for Buzz/rattle/vibration/ from the passenger side when the vehicle is under light load, with a 3.0L LZ0 Engine. It also addresses the potential for a slow/no crank or not charging.

This PI communicates diagnostic information to assist Technicians with a possible transmission shudder