GM’s headache of an L87 V8 is back on the operating table, and a new teardown has dug up more clues – and maybe even a fix.

A new class action says GM uses low oil to deny Duramax engine claims. GM’s own 2024 and 2025 dealer bulletins show why a cracked oil cooler makes a neglected engine and a defective one look the same.

I can’t believe General Motors is actually doing it. There was a rumor more than two years ago that GM would stuff an 8.3-liter Duramax diesel into the Chevy Silverado HD and GMC Sierra HD, but at the ...

The National Highway Traffic Safety Administration has opened an engineering analysis covering 997,743 General Motors trucks and SUVs after regulators found engines that had already been repaired or ...

It's been less than a year since GM announced it would be discontinuing support for Apple CarPlay in its cars. When the announcement first dropped, many of us couldn't help but scratch our heads and ...

Nearly one million GM truck and SUV owners are staring down a problem that should have been solved more than a year ago. On August 21, 2026, NHTSA's Office of Defects Investigation opened a fresh ...

NHTSA added 2 more model years of a total of 8 different vehicle types with the engine that it is investigating. The number of impacted vehicles, initially thought to be 597,630, has expanded to ...

GM CEO Mary Barra said that the next-generation Cadillacs will include new gas versions of the CT5 sedan, XT5 midsize SUV and discontinued three-row XT6 SUV. The new product announcements add to GM's ...

Steve Yzerman is out as Red Wings general manager. The team announced Wednesday morning that Yzerman is stepping down as GM and a search has begun for a new head of hockey operations. Internal ...

Your alternator replacement cost depends on your car's age and mileage. Your car’s alternator converts mechanical energy from your engine into electricity, powering your electronics and charging your ...

If you've shopped for a small-block crate engine anytime in the last decade, there's a decent chance that you checked out the Chevrolet LS9 Long Block. Unfortunately, all good things must come to an ...

Just yesterday, GM Authority brought you breaking news that General Motors had finally given the green light to move forward on a replacement for the Chevy Camaro, which was previously discontinued ...