2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Crate Engines

Whether you’re restoring your GM truck or aiming to boost its power, we offer a wide range of options to maximize your investment. Featuring reputable brands, our extensive selection of reliable and powerful crate engines and rebuild kits will elevate your truck’s performance and dependability to the next level. Pair your new crate engine with our selection of Complete transmissions! GM Duramax Fitments: 2004, 2005 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. 

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DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

DFC Diesel

DFC Diesel TH6604505LLYSOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

SKU: DDUTH6604505LLYSOALBHD
$27,677.69
DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

DFC Diesel

DFC Diesel TH6604505LLYSOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

SKU: DDUTH6604505LLYSOALB
$18,653.52
DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK

DFC Diesel

DFC Diesel SS6604505LLYTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK

SKU: DDUSS6604505LLYTKSOALBCC
$15,539.34
DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

DFC Diesel

DFC Diesel SS6604505LLYSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

SKU: DDUSS6604505LLYSOALBCC
$15,539.34
DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK
DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK

DFC Diesel

DFC Diesel SS6604505LLYTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY TOPKICK

SKU: DDUSS6604505LLYTKSOALB
$13,460.38
DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY
DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

DFC Diesel

DFC Diesel SS6604505LLYSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2004.5-2005 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LLY

SKU: DDUSS6604505LLYSOALB
$13,460.38
$14,460.38
Choate Engineering CEP66LLYLD 6.6L Duramax Daily Driver Long Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Choate Engineering CEP66LLYLD 6.6L Duramax Daily Driver Long Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Choate Engineering

Choate Engineering CEP66LLYLD 6.6L Duramax Daily Driver Long Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: CHTCEP66LLYLD
$12,500
Choate Engineering CEP66LLYSW 6.6L Duramax Workhorse Short Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Choate Engineering CEP66LLYSW 6.6L Duramax Workhorse Short Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Choate Engineering

Choate Engineering CEP66LLYSW 6.6L Duramax Workhorse Short Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: CHTCEP66LLYSW
$11,100
Choate Engineering CEP66LLYLW 6.6L Duramax Workhorse Long Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Choate Engineering CEP66LLYLW 6.6L Duramax Workhorse Long Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Choate Engineering

Choate Engineering CEP66LLYLW 6.6L Duramax Workhorse Long Block | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: CHTCEP66LLYLW
$14,800
$15,400
Choate Engineering CEP66LLYSD Short Block Daily Driver Crate Engine | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Choate Engineering CEP66LLYSD Short Block Daily Driver Crate Engine | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Choate Engineering

Choate Engineering CEP66LLYSD Short Block Daily Driver Crate Engine | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: CHTCEP66LLYSD
$9,000

2004.5-2005 6.6L Silverado & Sierra 2500HD/3500HD

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