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GMC Sierra 2500 Parts & Accessories
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GMC Sierra 2500 Specs & Standard Features
The GMC Sierra, counterpart to the Chevy Silverado, has gone through three revisions since its initial release in 2001. Each generation brings about several technological advancements and design changes, culminating in the modern pickup we know today.
4th Generation (GMTT1XX) 2020–Current
3rd Generation (GMTK2XX) 2015–2019
2nd Generation (GMT900) 2007–2014
1st Generation (GMT800) 2001–2006
GMC Sierra 2500 Resources
At RealTruck, our goal isn’t just to offer industry-leading parts and accessories but to help educate and inspire our customers. For tips, tricks, and recommended mods, check out all of our GMC Sierra 2500 guides on RealSource. Check out some of our experts’ favorites:
About the GMC Sierra 2500
The GMC Sierra 2500 is a mechanical clone of the Silverado 2500, also produced by General Motors. Though the Sierra is aimed more at luxury than the Silverado, both offer nearly identical aesthetics and features.
Like its sibling, the GMC Sierra 2500 is renowned for its robust reliability. Earlier generations, like the GMT800, are known to run indefinitely, with high-mileage examples reaching 300,000 miles and higher. The tried and tested combination of a 6.6L Duramax diesel engine and Allison automatic transmission has stood the test of time, remaining a constant throughout the model's entire production time.