https://www.powertrainproducts.net/product/1999-2007-4/ Built from 1999 through 2007, the 4.8L Vortec is part of GM’s LS-based engine family. Found in Silverados, Sierras, Tahoes, Yukons, Express and Savana vans, it’s known for its durability and simple design. With an iron block, aluminum heads, and LS-style architecture, the 4.8 offers plenty of parts interchangeability with other LS engines. While it isn’t the biggest power-maker from the factory, it has a reputation for reliability, long lif

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