Vehicle Update N25-250520 for the Chevy Silverado and GMC Sierra full-size GM trucks aims to improve the performance of two ...

A 2026 GMC Yukon owner reported an L87 engine failure at just 1,500 miles, despite GM’s efforts to address the issue in earlier models. According to the original poster, the GMC Yukon was delivered on ...

Nearly 600,000 truck owners learned their vehicles could suffer sudden engine seizure without warning, despite evidence that General Motors had documented the defect years earlier. Internal records ...

General Motors’ Active Fuel Management system has been around long enough to earn both fans and vocal critics, and that split has created a simple but urgent question for buyers: which GM engines ...

As GM Authority has covered for quite some time now, GM is set to launch a new variant of the mid-engine C8 that will dust off the Corvette Grand Sport nameplate and fill the gap between the C8 ...

You get into your car, turn the knob, brace for warmth, and get…refrigerated air. Augh. Before you assume the worst, though, take a breath. Most heater failures fall into a short, familiar list for ...