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GM engine recall investigation just got a whole lot bigger. By Jackie Charniga, Detroit Free Press USA TODAY Network via Reuters Connect Updated August 22, 2026 3:51 AM Gift Article The National Highway Traffic Safety Administration has escalated one of its investigations into General Motors vehicles for engine failure risks to include newer model years amid continuous consumer complaints. The federal agency said Aug. 21 that the new probe expands one of two existing recall investigations for the L87 6.2 liter V8 engines that NHTSA first began investigating in January 2025. The issue stems from manufacturing defects to a vehicle's connecting rod and crankshaft engine component, which GM attributed to multiple supplier manufacturing and quality issues. Drivers could experience "loss of motive power due to engine failure" as a result. "The safety and satisfaction of our customers are the highest priorities for the entire GM team, and we continue to cooperate with NHTSA's evaluation of this matter," GM spokesman Bill Grotz said in a statement emailed to the Detroit Free Press, part of the USA TODAY Network, on Aug. 21. NHTSA eyes two additional model years Vehicles equipped with the impacted engines include the Chevrolet Silverado 1500, Chevrolet Tahoe, Chevrolet Suburban and GMC Sierra 1500, GMC Yukon and GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV. NHTSA's initial investigation looked into 877,710 GM vehicles over reports of engine failures involving vehicles with the V8 engine. After its own investigations, GM voluntarily recalled 597,630 U.S. vehicles from model years 2021 through 2024 equipped with the engine on April 24, 2025, in the United States. GM recalled approximately 721,000 vehicles globally, which includes the U.S. figures. In October of that year, NHTSA opened an engineering analysis to investigate the success of the recall. The new engineering analysis covered 286,000 vehicles that were part of NHTSA's original investigation but weren't covered under a voluntary recall that GM issued earlier that year. NHTSA's Office of Defects Investigation opened another recall investigation into the engine fixes on Jan. 16, 2026. The new Aug. 21, 2026, probe adds 2025 and 2026 model years, ballooning the potentially impacted to a total of 997,743 vehicles in the United States. GM has not changed its recall, which still stands at 597,630 U.S. vehicles from model years 2021 to 2024. What to do if your car is impacted As part of GM's recall remedy, impacted customers were required to bring their vehicles to franchised GM dealerships for an engine inspection. If the engine passed muster, the vehicle would receive a higher viscosity oil, which also requires a new oil fill cap and an oil filter replacement. But if the engines failed the diagnostic test, dealerships replaced the entire engine. Pass or fail, GM implemented a special coverage program for all impacted vehicles that protected the engines in case the engines that passed the test were to fail later. That coverage remains in effect for 10 years from the date the vehicle was originally placed in service or after reaching 150,000 miles. Despite the two possible fixes, NHTSA has received 499 complaints alleging post-remedy engine failures in those recalls. Of those complaints, 473 customers claimed they received an oil viscosity change and another 26 a complete engine replacement. On top of that, a further 191 complaints were submitted of L87 engine failures in engines produced after the production period cited in the recall, NHTSA said. The agency added that GM reported receiving 6,953 complaints of post-remedy engine failure. (This story has been updated to clarify the nature of action by NHTSA). Jackie Charniga covers General Motors for the Free Press. Reach her at [email protected]. Reporting by Jackie Charniga, Detroit Free Press / Detroit Free Press USA TODAY Network via Reuters Connect This story was originally published August 22, 2026 at 3:30 AM.

GM commercial vehicle ECM could shorten work-truck development timelines. August 22, 2026 General Motors is offering commercial-vehicle builders a new engine control module designed to shorten the earliest stage of integrating its 6.6-liter heavy-duty gasoline engine into work trucks and specialty vehicles. FreightWaves reported August 22 that GM Powered Solutions ships the controller with an approved base calibration, giving engineering teams a running foundation instead of beginning with a blank module. The package is aimed at business-to-business customers developing step vans, vocational trucks and last-mile vehicles that may not carry a GM badge. Its software can be tailored so the controller communicates with a customer's vehicle architecture and supports application-specific features. GM also included extra input-and-output capability that could support future configurations, including hybrid systems, although no particular hybrid product was announced. The distinction between a development tool and a finished road-certified system is important. GM says the base calibration can run the engine at full power in a test cell, but the customer remains responsible for integrating the selected intake and exhaust hardware, completing emissions calibration and obtaining the certifications required for the final vehicle. The module therefore reduces initial engineering work; it does not make an incomplete vehicle ready for public-road operation. For fleets and upfitters, a shorter development cycle could expand chassis choices and help specialized vehicles reach production faster. Buyers should still evaluate who owns final calibration, warranty boundaries, diagnostic access, cybersecurity updates, parts availability and service coverage. Fleet maintenance teams also need documentation for fault codes and body-controller interfaces before deployment. The practical value will be measured by reliable production vehicles, not only quicker test-cell starts. A configurable ECM can remove a technical bottleneck, but complete validation remains essential for safety, emissions compliance and long-term uptime. Build your CDL career with patriot CDL. Explore professional Class A, Class B and restriction-removal training in Levittown, Pennsylvania.

Next-Gen 2029 Chevrolet Camaro GT four-door has ICE power under the hood and CGI Z28 trim pack. Alexis Poncelet, a car designer for GAC Milano who also dwells on social media independently as 'alexey_ponslav,' has decided that Chevrolet needs a Camaro GT Published: 21 Aug 2026, 22:00 UTC - By: Photo: alexey_ponslav / Instagram General Motors didn't ignore the Monterey Car Week in favor of the Woodward Dream Cruise like Stellantis and the Ford Motor Company did this year, but they also focused on just one of their main brands in the process. Stellantis allowed Dodge and Chrysler to play with the dreams of Mopar fans during the Roadkill Nights and Woodward Dream Cruise events in Detroit just as the entire automotive world was focused on the Monterey Car Week on the other coast in California. The Ford Motor Company also joined its rivals and presented the Ford Mustang Dark Horse SC Convertible at Woodward instead of traveling to the Monterey Peninsula. On the other hand, General Motors decided to hit the West Coast in time for the Monterey Car Week festivities with all-new high-end concepts and custom vehicles from Cadillac alone: they expanded the Curated by Cadillac bespoke customization program to the Escalade IQ, unveiled the one-off Celestiq Night Test, and also unleashed the V-One concept. The latter was presented as a single-seat track menace sharing its bones with the V-Series.R race car and pushing 830 hp from its hybrid V8 engine setup. But what about the other brands - Buick, Chevrolet, and GMC? Well, they weren't deemed exotic enough for the Monterey Car Week, so a member of the imaginative guild of digital car content creators dwelling across the parallel universes of vehicular CGI stepped in to save the day. More precisely, Alexis Poncelet, a car designer for GAC Milano who previously worked for the VW Future Center Europe, also dwells on social media independently as 'alexey_ponslav,' and has decided that Chevrolet needs a Camaro GT in its lineup. The pixel master heard it from across the rumor mill that GM's upcoming next-generation 2029 Chevrolet Camaro will reportedly have four doors and "to be honest I'm kind of curious what could a Chevy GT would look like," and he quickly imagined one in his latest unofficial, hypothetical design project. Just like many other modern passenger cars, for example, the Toyota Crown and the upcoming Land Rover Range Rover GT, this model also has a fastback, high-riding profile with black plastic protection elements around the base of the car and the wheel arches. The front is interesting because it suggests this all-new 2029 Chevrolet Camaro GT is an electric vehicle due to the closed-off front surface with only a small grille embedded in the bumper and the headlights spanning both horizontally and vertically to form a squared-off front fascia. The profile is the modern fastback look with a high and muscular shoulder line and small glasshouse; there are also hidden door handles and a very small rear window with an integrated black roof spoiler. The rear is also 'muscular' due to the protruding bumper, and Autoevolution can finally see that this project is ICE-powered via the quad exhaust outlets integrated into the massive black plastic air diffuser. Cool or not? Liked the article? Follow Autoevolution to see more articles from autoevolution in your Google feeds. Aurel has aimed high all his life (literally, at 16 he was flying gliders all by himself) so in 2006 he switched careers and got hired as a writer at his favorite magazine. Since then, his work has been published both by print and online outlets, most recently right here, on autoevolution. Full profile