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Torqued Up! 2024 Sierra AT4X Gets Duramax Diesel PowerGMC worked out the issue on the 2022 Sierra AT4 and now the 3.0-liter Duramax I-6 turbodiesel engine is standard on the 2024 AT4X and remains optional on all trims except for the base Sierra Pro.
Our 2024 GMC Sierra AT4X AEV Edition test truck featured the optional Duramax 3.0-liter turbodiesel engine with 305 horsepower and 495 lb-ft of torque. Although the Sierra AT4X AEV Edition boasts ...
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