Merchant Automotive has become the largest Duramax parts supplier, manufacturer, and service center in the world. We are continuously innovating and working to make sure our customers are purchasing the best products and receiving the best service. Merchant Automotive offers a variety of Duramax engine parts including Allison transmission parts, filters, fluids, tools, cooling systems, performance parts, transfer cases, and much more for LLY, LB7, LBZ, LMM, LML, L5P, LGH, and LWN Duramax Engines.
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