GM Authority is taking a closer look at the 2026 GMC Sierra HD payload capacities, including all of the different ...
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Diesel or gas for your Sierra 2500 HD
The 2026 GMC Sierra 2500 HD gives buyers a clear choice between a 6.6L V8 gas engine and a 6.6L Duramax turbo-diesel V8, each tuned for different needs. Gas offers lower upfront cost and simpler ...
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