Diesel engines like the 3.0L Duramax require special maintenance, including the use of DEF, or Diesel Exhaust Fluid. Now, GM ...

A 2024 GMC Sierra EV owner turned a daunting 5,300-mile coast-to-coast trek into a "relaxed commute" by letting SuperCruise ...

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UPDATE 12/17/25: Chevrolet provided the following statement regarding the patent filing: "GM regularly files with the US Patent Office to protect our IP, trademark, and technologies. Filings are not ...

From the January/February 2026 issue of Car and Driver. We like our full-size SUVs like we like our burritos: big and made with high-quality ingredients. It's why we often take our lunches at Chipotle ...

It’s not unreasonable to state just about everyone in Canada has owned a pickup of this ilk or knows someone who has. These mid-’90s GM trucks were everywhere, found both outside hockey rinks and in ...

If you’re a regular here at GM Authority, then it’s highly likely you’ve already seen at least part of our extensive coverage on the next-generation 2027 Chevy Silverado 1500 and 2027 GMC Sierra 1500.

Repeat Failures: A loyal GM owner reports two consecutive GMC Sierra 3.0L diesel engine failures—one at 31,000 miles and another at just 6,961 miles. Official Confirmation: The failures align with GMC ...