NHTSA expands GM engine recall probe to include more model years

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1. 1d ago

   NHTSA Expands GM V8 Engine Probe to Cover Nearly One Million Vehicles

   Federal safety regulators expanded their investigation into General Motors vehicles, advancing the review of the 6.2-liter L87 V8 engine to cover an estimated 997,743 trucks and SUVs from the 2021 through 2026 model years. The National Highway Traffic Safety Administration is examining reports of engines seizing suddenly without warning, which can cause a total loss of power while driving. Affected models include the Chevrolet Silverado 1500, GMC Sierra, Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon, and Cadillac Escalade. No vehicle recalls have been announced in connection with this specific engine investigation.

   Why it matters

   The National Highway Traffic Safety Administration maintains an active docket of defect investigations covering common American vehicles for issues ranging from engine seizures to brake assist failures. This particular engine inquiry escalated as federal regulators continue monitoring mechanical failures that leave full-size pickups and SUVs stranded on the road. Separately, the agency has examined over one million vehicles regarding electronic brake booster issues that can trigger a loss of braking and steering assist.

   What is confirmed

   • The National Highway Traffic Safety Administration expanded its engine probe to cover 997,743 trucks and SUVs from model years 2021 through 2026 equipped with the 6.2-liter L87 V8.
   • Affected vehicles in the expanded engine investigation include the Chevrolet Silverado 1500, GMC Sierra, Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon, and Cadillac Escalade.
   • Investigators are examining engine seizures that can occur with little warning and leave full-size pickups without power on the road.

   What to watch next

   • Whether the National Highway Traffic Safety Administration upgrades the engine investigation to an official recall
   • Further data releases from federal safety regulators regarding engine failure complaints and incident reports
   Sources used for this update (2)

   1. morningoverview.com — 12 vehicles federal safety investigators are probing right ...
   2. cartroublelab.com — Vehicle Fault Database | Recalls, Complaints & Investigations
   confidence 100%
2. 5d ago

   NHTSA Expands General Motors V8 Engine Probe to Engineering Analysis

   Federal safety regulators expanded their scrutiny of General Motors vehicles, advancing an investigation into the automaker's 6.2-liter V8 engine to an Engineering Analysis stage. This escalation follows previous regulatory action involving an estimated 1,164,820 General Motors, Honda, and Acura vehicles examined over electronic brake booster failures that can cause a loss of braking and steering assist. The National Highway Traffic Safety Administration previously logged 745 complaints, 22 crashes or fires, six injuries, and no deaths regarding that separate brake booster probe, while no vehicle recalls have been announced for either investigation.

   Why it matters

   Engineering analyses represent a formal step taken by the National Highway Traffic Safety Administration when preliminary evaluations uncover sufficient concern to warrant deeper technical scrutiny. Regulators investigate potential mechanical or electronic defects across multiple model years to determine if a formal safety recall is necessary. Understanding how these probes progress helps vehicle owners track whether manufacturing flaws will result in mandatory repair campaigns.

   What is confirmed

   • The National Highway Traffic Safety Administration advanced its investigation into General Motors' 6.2-liter V8 engine to an Engineering Analysis.

   What to watch next

   • Whether the National Highway Traffic Safety Administration expands the engine probe to include specific vehicle models or production years.
   • Any official announcement from General Motors or federal regulators regarding a potential vehicle recall stemming from the engine investigation.
   Sources used for this update (2)

   1. motoringchronicle.com — Why NHTSA's GM Engine Probe Just Expanded to Nearly 1 Million ...
   2. vehicle-recall.com — Latest recalls - Vehicle Recall
   confidence 100%
3. 7d ago

   Federal Probe Into GM eBoost Failures Expands to Over 1.1 Million Vehicles

   Federal safety regulators expanded an engineering analysis covering an estimated 1,164,820 General Motors, Honda, and Acura vehicles over potential electronic brake booster failures that can cause a loss of both braking and steering assist. Published documents from the National Highway Traffic Safety Administration show the agency has logged 745 complaints, 22 crashes or fires, six injuries, and no deaths. No vehicle recall has been announced regarding this investigation. The probe assesses the safety consequences of eBoost failures across multiple model years and brands.

   Why it matters

   The National Highway Traffic Safety Administration opened engineering analysis EA26006 on August 21, 2026, which upgrades an earlier preliminary evaluation numbered PE24011 that began in April 2024. This expanded inquiry encompasses every vehicle utilizing the shared electronic brake booster part, reaching beyond the originally examined General Motors models to include two Honda-badged electric SUVs built by General Motors. Agencies use engineering analyses to determine whether a safety defect warrants a manufacturer recall.

   What is confirmed

   • The National Highway Traffic Safety Administration opened an engineering analysis covering 1,164,820 General Motors, Honda, and Acura vehicles.
   • The federal inquiry has logged 745 complaints, 22 crashes or fires, six injuries, and no deaths.
   • The engineering analysis, numbered EA26006, was opened on August 21, 2026, as an upgrade to an earlier preliminary evaluation from April 2024.

   What to watch next

   • Whether the National Highway Traffic Safety Administration decides to request a safety recall from the automakers.
   • Further updates regarding the safety consequences of the electronic brake booster failures.
   Sources used for this update (3)

   1. www.foxbusiness.com — Ford - Fox Business ,Saving & Investing
   2. morningoverview.com — Brakes and steering assist can both fail on 1,164,820 GM ...
   3. offroadslogistics.com — Car Problems, Recalls & MPG by Model Year (NHTSA & EPA Data)
   confidence 100%
4. 11d ago

   NHTSA Expands GM eBoost Probe to Over 1.1 Million Vehicles

   Federal safety regulators expanded an investigation into General Motors vehicles regarding potential eBoost brake-module failures. The National Highway Traffic Safety Administration opened engineering analysis EA26006 on August 21, 2026, targeting approximately 1,164,820 General Motors vehicles. The inquiry covers model years 2024 through 2026 for the Traverse, Colorado, Equinox EV, and Cadillac Lyriq models. Agency documents note that the probe involves issues that can cause an immediate loss of brake assist, and cites 745 complaints alongside 22 crashes or fires.

   Why it matters

   The National Highway Traffic Safety Administration routinely opens engineering analyses as an investigative step to determine whether vehicle components pose an unreasonable safety risk. These examinations serve as a pre-recall watch for motorists and manufacturers alike, though an investigation does not guarantee that a formal recall will occur. This probe adds scrutiny to newer General Motors vehicle models utilizing the eBoost system.

   What is confirmed

   • The National Highway Traffic Safety Administration opened engineering analysis EA26006 on August 21, 2026.
   • The probe covers about 1,164,820 General Motors vehicles, including 2024-2026 Traverse, Colorado, Equinox EV, and Cadillac Lyriq models.
   • The investigation concerns eBoost brake-module failures that can cause an immediate loss of brake assist, and cites 745 complaints and 22 crashes or fires.

   What to watch next

   • Whether the National Highway Traffic Safety Administration upgrades engineering analysis EA26006 to a safety recall.
   • Further General Motors or regulatory disclosures regarding eBoost brake-module performance in the targeted model years.
   Sources used for this update (3)

   1. morningoverview.com — 8 popular vehicles federal safety regulators started ...
   2. www.repairsurge.com — NHTSA Complaints, Recalls & TSBs — All Makes & Models ...
   3. vincheckengine.com — Vehicles Under Active NHTSA Investigation — Pre-Recall Watch ...
   confidence 100%
5. 13d ago

   NHTSA expands GM engine recall probe to include more model years

   The US National Highway Traffic Safety Administration (NHTSA) is investigating potential brake-assist failures in nearly 1.2 million General Motors vehicles. The probe targets the eBoost brake-by-wire system across multiple nameplates, including GM, Honda, and Acura models. Reports of unexpected power assist loss and brake failure have been linked to at least 22 crashes. GM previously recalled vehicles with L87 6.2-liter V8 engines, but 473 engines failed after receiving a fix involving thicker oil.

   Why it matters

   The investigation is focused on the eBoost brake-by-wire system and its potential failure, which could lead to brake-assist issues. This probe is separate from an earlier recall of vehicles with L87 6.2-liter V8 engines, which experienced engine-bearing failures. The NHTSA is evaluating the system's safety and determining whether a formal recall is necessary.

   What is confirmed

   • The NHTSA initiated Engineering Analysis EA26006 on August 21, 2026, to investigate potential brake-assist failures in over 1.16 million General Motors vehicles.
   • GM's fix for failing 6.2L V8 engines involved using 0W-40 oil instead of 0W-20, but 473 engines failed anyway.
   • The probe targets the eBoost brake-by-wire system across 12 nameplates, including Honda Prologue and Acura ZDX.
   • Reports of unexpected power assist loss and brake failure have been linked to at least 22 crashes.

   What to watch next

   • The NHTSA's decision on whether to order a formal recall for the affected fleet.
   • Further reports of engine failures or brake-assist issues in vehicles with L87 6.2-liter V8 engines.
   • GM's response to the NHTSA's investigation and potential recall.
   Sources used for this update (6)

   1. autos.yahoo.com — GM's Fix for Its Failing 6.2L V8 Was Thicker Oil. 473 Engines Failed Anyway. - Yahoo Autos
   2. morningoverview.com — NHTSA opened a new GM V8 investigation after recall-scope ...
   3. backfirenews.com — GM L87 6.2L V8 Recall: 473 Engines Failed After the Oil Fix ...
   4. dealershiptechreport.com — Brake-assist failure probe expands to nearly 1.2 million GM ...
   5. www.harmreport.com — GM - 1.16M Vehicles Probed Over eBoost Brake Failures
   6. www.carpaperwork.com — Car Recalls by Make and Model: 3,105 NHTSA Campaigns (2026)
   confidence 90%
6. 25d ago

   NHTSA launches formal engineering analysis into GM eBoost brake systems

   The National Highway Traffic Safety Administration initiated Engineering Analysis EA26006 on August 21, 2026, to investigate potential brake-assist failures in more than 1.16 million General Motors vehicles. The probe targets the eBoost brake-by-wire system across 12 nameplates, including the Honda Prologue and Acura ZDX. Regulators are evaluating the system after reports of unexpected power assist loss and brake failure linked to at least 22 crashes. The agency is now moving toward a decision on whether a formal recall is necessary for the affected fleet.

   Why it matters

   Brake-by-wire systems replace traditional hydraulic links with electronic controls to manage stopping power. A failure in power assist increases the effort required to stop a vehicle, raising significant safety concerns. This investigation expands the scope of previous reports regarding system reliability.

   What is confirmed

   • The NHTSA initiated Engineering Analysis EA26006 on August 21, 2026.
   • More than 1.16 million General Motors vehicles are part of the federal investigation into the eBoost braking system.
   • The probe includes 12 nameplates, including the Honda Prologue and Acura ZDX.
   • The investigation follows reports of brake failure and power assist loss linked to at least 22 crashes.

   What to watch next

   • NHTSA decision on whether to mandate a formal recall
   • GM response to the findings of Engineering Analysis EA26006
   Sources used for this update (3)

   1. autos.yahoo.com — Over 1.1 Million GM Vehicles Face Investigation Over Potential Brake-Assist Failure
   2. chiefswire.usatoday.com — With over-the-air update, GM launches camera recording to new vehicles
   3. www.torquenews.com — A Chevy Silverado's 6.2L V8 Failed at 98,876 Miles Under GM's Recall, but the Replacement Engine Is Backordered With No Timeline
   confidence 100%
7. 45d ago

   NHTSA expands GM eBoost brake probe to 12 models including Honda and Acura

   The National Highway Traffic Safety Administration expanded its engineering analysis of GM eBoost brake-by-wire systems to 1.16 million vehicles across 12 nameplates. The probe follows hundreds of reports regarding brake failure and unexpected power assist loss. The investigation now includes the Honda Prologue and Acura ZDX in addition to GM brands. Regulators are moving toward a potential recall decision after the system was linked to at least 22 crashes.

   Why it matters

   The eBoost system was first flagged in the Cadillac Lyriq before investigators found the fault affected other models sharing the same hardware. This probe runs parallel to a separate federal investigation into V-8 engine failures in nearly one million GM pickups and SUVs.

   What is confirmed

   • The NHTSA investigation into GM eBoost brake systems covers 1.16 million vehicles.
   • The probe includes 12 different nameplates.
   • The investigation has been escalated to an engineering analysis.
   • The brake system issues are linked to 22 crashes.
   • The probe includes the Honda Prologue and Acura ZDX.

   Still unconfirmed

   • The investigation is linked to 745 brake incidents and 21 crashes.
   • Federal regulators are one step from ordering a recall on 1.2 million vehicles.

   What to watch next

   • NHTSA final decision on whether to order a formal recall
   • Identification of the specific technical cause of the power assist loss
   • Official response from Honda and Acura regarding the shared GM system
   Sources used for this update (5)

   1. www.cbtnews.com — NHTSA expands GM brake probe to 12 models, two Honda vehicles
   2. autos.yahoo.com — Feds moving closer to a brake recall on 1.2 million GM cars
   3. autos.yahoo.com — 1.1 Million GM Vehicles, 22 Crashes, 0 Recall Yet: GM’s eBoost Brake System Faces Federal Scrutiny
   4. www.nbcchicago.com — Millions of eggs recalled over salmonella concerns. See the brands and where they were sold
   5. www.carscoops.com — US Escalates Probe Into 1.1 Million GM Vehicles Linked To 745 Brake Incidents And 21 Crashes
   confidence 90%
8. 47d ago

   NHTSA escalates GM brake-by-wire probe to engineering analysis

   Federal investigators have upgraded their probe into General Motors eBoost brake-by-wire systems to an engineering analysis. The investigation covers between 1.1 million and 1.16 million electric vehicles following customer reports of unexpected power assist loss. This escalation follows reports that the system is responsible for at least 22 crashes. The probe occurs alongside a separate federal investigation into failures of GM V-8 engines in nearly one million pickups and SUVs.

   Why it matters

   The eBoost system manages braking assistance in GM electric vehicles. A failure in this system can reduce the driver's ability to stop the vehicle quickly. This adds to the regulatory pressure on GM as it manages multiple large-scale safety investigations.

   What is confirmed

   • The NHTSA opened an engineering analysis into GM eBoost brake-by-wire systems.
   • The brake investigation covers between 1.1 million and 1.16 million vehicles.

   Still unconfirmed

   • The eBoost brake-by-wire system is responsible for at least 22 crashes.

   What to watch next

   • NHTSA decision on whether to mandate a formal recall for the eBoost system
   • Release of specific affected GM EV models
   • Updates on the concurrent V-8 engine failure probe
   Sources used for this update (4)

   1. www.autoevolution.com — Over 1.1 Million GM Vehicles Investigated for eBoost Brake-by-Wire System Issues
   2. arstechnica.com — Feds deepen probe into General Motors brake failures
   3. www.whalesbook.com — General Motors Faces Expanded NHTSA Probe on 1.16 Million EVs
   4. www.topspeed.com — GM EVs Are Now Under Federal Investigation For Brake Failures — Here's What Owners Need To Know
   confidence 90%
9. 49d ago

   NHTSA expands engine failure probe to nearly one million GM vehicles

   The National Highway Traffic Safety Administration expanded its investigation into GM V-8 engines after reports of failures continued despite a previous recall remedy. The probe now covers 997,000 pickups and SUVs. Federal regulators are examining why these engines continue to fail, specifically targeting vehicles that already received the official fix. The investigation focuses on the reliability of the remedy and the safety risks posed by sudden engine implosions in nearly one million vehicles.

   Why it matters

   This probe follows an existing recall intended to resolve engine issues in GM V-8s. The persistence of failures after the remedy suggests the original fix was insufficient. If the NHTSA finds the remedy ineffective, GM may be forced to issue a second, more comprehensive recall.

   What is confirmed

   • The NHTSA expanded its probe into GM V-8 trucks and SUVs.
   • The investigation covers 997,000 vehicles.
   • Engines have reportedly failed after receiving a recall remedy.

   What to watch next

   • NHTSA determination on the effectiveness of the previous recall remedy
   • Potential announcement of a new mandatory recall for the expanded vehicle set
   Sources used for this update (5)

   1. Reuters — US highway agency expands probe into GM pickups, SUVs over engine failures
   2. Car and Driver — NHTSA Opens Investigation Into GM V-8s That Won’t Stop Imploding, Despite Receiving Recall Remedy
   3. WSJ — GM Faces Safety Probe Over Engine-Failure Concerns in Nearly One Million Vehicles
   4. Detroit Free Press — NHTSA expands GM engine recall probe to include more model years
   5. Road & Track — NHTSA Expands Probe Into 997,000 GM V-8 Trucks and SUVs After Reported Post-Recall Engine Failures
   confidence 100%