The turbocharger on your 2001-2004 GM 6.6L Duramax LMM is a decent unit for daily tasks, but you can start to experience its limitations during more heavy-duty applications like towing or hardcore off-roading. Our offering of upgraded turbochargers unleashes more power in your engine or pick up a factory replacement to help your truck last longer overall. Our selection of turbochargers is built to meet and/or exceed OEM quality for consistent and reliable performance. Take your diesel engine to the next level with a premium replacement turbocharger for your GM 2500HD/3500HD's custom build. Pair your turbo upgrades with our complete collection of Engine Upgrades. GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax.Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.Some exceptions apply, please see individual product pages for specific fitments.