A GMC Sierra AT4 owner is trading in his Duramax for a 2025 Ford F-150 Lariat after repeat "Check Engine" failures. From "seats that suck" to coolant valve nightmares, find out why this high-mileage ...
General Motors launched the GMC Sierra AT4 with the debut of the light-duty pickup’s fourth generation for the 2019 model year. The Sierra range, including the AT4, was later refreshed for the 2022.5 ...
General Motors refreshed the light-duty GMC Sierra 1500 for the 2022 (technically 2022.5, or 2022 interim) model year, debuting a laundry list of updates and changes. Among these was updated styling, ...