2005 GMC 2500 HD Crew Cab - Colossal Crew Cab
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The 6.6L Duramax diesel engine received some proven upgrades like an Airaid intake system, five-level Edge controller, and an MBRP stainless steel 4-inch-diameter exhaust. Power is routed through the stock Allison five-speed transmission to the stock two-speed transfer case. View Related Article
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