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LLY Duramax Parts

Parts for the LLY Duramax (2004.5 to 2005).

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  • 2001-2005 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission | 1000HP Rated. 2001-2005 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission | 1000HP Rated.

    2001-2005 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission | 1000HP Rated

    Firepunk
    $9,995.00 - $10,795.00
    $9,995.00
    $9,995.00 - $10,795.00
    $9,995.00

    2001-2005 Firepunk Proven A1000 Allison Transmission Features: Great For Highly Modified Trucks Up To 1000HP 2-Year Unlimited Mileage, 100% Workma...

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    $9,995.00 - $10,795.00
    $9,995.00
    $9,995.00 - $10,795.00
    $9,995.00
    Select Options
  • Firepunk 2001-2005 Allison 5 Speed Master Rebuild Kit. Firepunk 2001-2005 Allison 5 Speed Master Rebuild Kit.

    Firepunk 2001-2005 Allison 5 Speed Master Rebuild Kit

    Firepunk
    $1,900.00 - $1,900.00
    $1,900.00
    $1,900.00 - $1,900.00
    $1,900.00

    Our 01-05 Allison master rebuild kit includes all the parts you need to rebuild your owntransmission. These are the main components we use in all o...

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    $1,900.00 - $1,900.00
    $1,900.00
    $1,900.00 - $1,900.00
    $1,900.00
  • Save 3% Save %

    Industrial Injection 01-16 Chevrolet Duramax 6.6L 130lb Valve Spring Kit

    Industrial Injection
    $900.95
    $900.95 - $900.95
    $900.95
    $873.92
    $873.92 - $873.92
    $873.92

    Industrial Injection 2001 to 2016 Chevrolet Duramax 6.6L 130lb Valve Spring Kit. Sold and shipped by Powerhouse Diesel, a diesel repair and perform...

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    $900.95
    $900.95 - $900.95
    $900.95
    $873.92
    $873.92 - $873.92
    $873.92
    Save 3% Save %
  • Save 3% Save %

    Industrial Injection 04.5-10 Chevrolet Duramax LLY/LBZ/LMM GT3788 XR Series 61mm Turbo Upgrade

    Industrial Injection
    $2,166.95
    $2,166.95 - $2,166.95
    $2,166.95
    $2,101.94
    $2,101.94 - $2,101.94
    $2,101.94

    Industrial Injection 2004.5 to 2010 Chevrolet Duramax LLY/LBZ/LMM GT3788 XR Series 61mm Turbo Upgrade. Sold and shipped by Powerhouse Diesel, a die...

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    $2,166.95
    $2,166.95 - $2,166.95
    $2,166.95
    $2,101.94
    $2,101.94 - $2,101.94
    $2,101.94
    Save 3% Save %
  • Save 3% Save %

    Industrial Injection 04.5-10 Chevrolet Duramax 6.6L XR2 Series Turbocharger 68mm/67mm

    Industrial Injection
    $3,001.95
    $3,001.95 - $3,001.95
    $3,001.95
    $2,911.89
    $2,911.89 - $2,911.89
    $2,911.89

    Industrial Injection 2004.5 to 2010 Chevrolet Duramax 6.6L XR2 Series Turbocharger 68mm/67mm. Sold and shipped by Powerhouse Diesel, a diesel repai...

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    $3,001.95
    $3,001.95 - $3,001.95
    $3,001.95
    $2,911.89
    $2,911.89 - $2,911.89
    $2,911.89
    Save 3% Save %
  • Save 3% Save %

    Industrial Injection 04.5-10 Chevrolet Duramax 6.6L (LLY/LBZ/LMM) GT3788 XR Series Turbo - 64mm

    Industrial Injection
    $2,320.95
    $2,320.95 - $2,320.95
    $2,320.95
    $2,251.32
    $2,251.32 - $2,251.32
    $2,251.32

    Industrial Injection 2004.5 to 2010 Chevrolet Duramax 6.6L (LLY/LBZ/LMM) GT3788 XR Series Turbo, 64mm. Sold and shipped by Powerhouse Diesel, a die...

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    $2,320.95
    $2,320.95 - $2,320.95
    $2,320.95
    $2,251.32
    $2,251.32 - $2,251.32
    $2,251.32
    Save 3% Save %
  • Save 3% Save %

    Industrial Injection 04.5-05 Chevrolet Duramax LLY Ported & Polished Cylinder Heads

    Industrial Injection
    $3,995.95
    $3,995.95 - $3,995.95
    $3,995.95
    $3,876.07
    $3,876.07 - $3,876.07
    $3,876.07

    Fits: 2004 to 2005 Chevrolet Silverado 2500 HD; 2004 to 2005 GMC Sierra 2500 HD. Questions on fitment? Call our shop at 865 640 2097 and talk to a ...

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    $3,995.95
    $3,995.95 - $3,995.95
    $3,995.95
    $3,876.07
    $3,876.07 - $3,876.07
    $3,876.07
    Save 3% Save %

  • Powerhouse Diesel 01-16 GM 6.6L Duramax Short Block

    Powerhouse Diesel
    $8,550.00 - $8,550.00
    $8,550.00
    $8,550.00 - $8,550.00
    $8,550.00

    We own the machines that build this engine. Every operation happens under our roof. No outsourced machine shop, no third party assembler, no waitin...

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    $8,550.00 - $8,550.00
    $8,550.00
    $8,550.00 - $8,550.00
    $8,550.00
    Select Options
  • responsive-image responsive-image

    Kryptonite Stage 3 Leveling Kit with Eibach Shocks for 2001 to 2010 Chevy/GMC HD Trucks

    Kryptonite
    $1,278.69 - $1,278.69
    $1,278.69
    $1,278.69 - $1,278.69
    $1,278.69

    Kryptonite Part #- KR10STAGE3EIB Fits: 2001-2007 Chevy Silverado / GMC Sierra 1500HD  2001-2010 Chevy Silverado / GMC Sierra 2500HD 2001-2010 Chev...

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    $1,278.69 - $1,278.69
    $1,278.69
    $1,278.69 - $1,278.69
    $1,278.69
  • Photo - Primary Photo - Primary Save 3% Save %

    South Bend Clutch 01-09/2005 Chevy 6.6L Duramax LLY-LB7 Street Dual Disc Clutch Kit

    South Bend Clutch
    $1,435.72
    $1,435.72 - $1,435.72
    $1,435.72
    $1,392.00
    $1,392.00 - $1,392.00
    $1,392.00

    Fits: 2001 to 2005 Chevrolet Silverado 2500 HD; 2001 to 2004 Chevrolet Silverado 3500; 2001 to 2004 GMC Sierra 2500 HD; 2001 to 2004 GMC Sierra 350...

    View full details
    $1,435.72
    $1,435.72 - $1,435.72
    $1,435.72
    $1,392.00
    $1,392.00 - $1,392.00
    $1,392.00
    Save 3% Save %
  • Logo Image Logo Image

    BD Diesel 01-16 Chevrolet/GMC 2500HD/3500HD 6.6L Duramax Passenger Side Exhaust Manifold

    BD Diesel
    $249.63 - $249.63
    $249.63
    $285.95
    $285.95 - $285.95
    $285.95

    BD Diesel Model 1041461Experience performance and durability with the enhanced Duramax exhaust manifolds, specifically designed for the 2001-2016 6...

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    $249.63 - $249.63
    $249.63
    $285.95
    $285.95 - $285.95
    $285.95
  • responsive-image responsive-image

    Fleece 01-04 GM Silverado/Sierra 2500 6.6L-V8 Duramax Truck PowerFlo In-tank Lift Pump

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $649.00
    $649.00 - $649.00
    $649.00

    Fleece Performance Model FPE-PF-GM-0104Fleece Performance Model FPE-PF-GM-0104Fleece 01-04 GM Silverado/Sierra 2500 6.6L-V8 Duramax Truck PowerFlo ...

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    $0.00 - $0.00
    $0.00
    $649.00
    $649.00 - $649.00
    $649.00
  • responsive-image responsive-image

    Fleece Performance GM Automatic Transmission 20-Pin Pigtail

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $99.99
    $99.99 - $99.99
    $99.99

    Fleece Performance Model FPE-HAR-GM-AT-20-PTFleece Performance GM Automatic Transmission 20-Pin Pigtail Our replacement GM Automatic Transmission 2...

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    $0.00 - $0.00
    $0.00
    $99.99
    $99.99 - $99.99
    $99.99
  • responsive-image responsive-image

    Yukon Gear 01-07 Chevrolet/GMC Pickup/SUV w/33 Spline Output Power Steering Gear Box

    Yukon Gear & Axle
    $389.31 - $389.31
    $389.31
    $389.31 - $389.31
    $389.31

    Yukon Gear 2001 to 2007 Chevrolet/GMC Pickup/SUV with 33 Spline Output Power Steering Gear Box. Sold and shipped by Powerhouse Diesel, a diesel rep...

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    $389.31 - $389.31
    $389.31
    $389.31 - $389.31
    $389.31
  • responsive-image responsive-image

    Yukon Gear 02-22 GM Truck/SUV/Van Power Steering Gear Box

    Yukon Gear & Axle
    $466.37 - $466.37
    $466.37
    $466.37 - $466.37
    $466.37

    Yukon Gear 2002 to 2022 GM Truck/SUV/Van Power Steering Gear Box. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in Kn...

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    $466.37 - $466.37
    $466.37
    $466.37 - $466.37
    $466.37
  • User 1 User 1

    Fleece Performance 01-04 GM 2500/3500 Duramax (w/Allison Transmission) NSBU Pigtails

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $79.99
    $79.99 - $79.99
    $79.99

    Fleece Performance Model FPE-HAR-GM-NSBU-0104Fleece Performance 01-04 GM 2500/3500 Duramax (w/Allison Transmission) NSBU Pigtails Replacement NSBU ...

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    $0.00 - $0.00
    $0.00
    $79.99
    $79.99 - $79.99
    $79.99
  • Photo - Primary Photo - Primary

    Yukon Gear Dana M300/Dana S135 Carrier Bearing Kit - 2.953in ID/ 4.370in OD

    Yukon Gear & Axle
    $161.20 - $161.20
    $161.20
    $161.20 - $161.20
    $161.20

    Yukon Gear & Axle Model CK FF001Yukon Carrier Installation Kits are a convenient and low-cost solution for carrier changes in cases where one i...

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    $161.20 - $161.20
    $161.20
    $161.20 - $161.20
    $161.20
  • Photo - Primary Photo - Primary

    ATS Diesel ATS Extra Deep Transmission Pan - Allison LCT1000/2000 Automatic

    ATS Diesel
    $384.99 - $384.99
    $384.99
    $384.99 - $384.99
    $384.99

    Fits: 9 vehicle models, including 2001 to 2005 Chevrolet Silverado 2500 HD; 2001 to 2005 Chevrolet Silverado 3500; 2001 to 2005 GMC Sierra 2500 HD....

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    $384.99 - $384.99
    $384.99
    $384.99 - $384.99
    $384.99
  • Photo - Primary Photo - Primary

    ATS Diesel 2001-2010 GM TripleLok Torque Converter

    ATS Diesel
    $1,299.99 - $1,299.99
    $1,299.99
    $1,299.99 - $1,299.99
    $1,299.99

    Fits: 10 vehicle models, including 2001 to 2004, 2007 to 2010 Chevrolet Silverado 2500 HD; 2001 to 2004, 2007 to 2010 GMC Sierra 2500 HD; 2006 to 2...

    View full details
    $1,299.99 - $1,299.99
    $1,299.99
    $1,299.99 - $1,299.99
    $1,299.99
    Select Options
  • Photo - Primary Photo - Primary

    ATS Diesel 2003-05 GM LCT1000 Performance Valve Body Assembly

    ATS Diesel
    $879.99 - $879.99
    $879.99
    $879.99 - $879.99
    $879.99

    Fits: 5 vehicle models, including 2001 to 2005 Chevrolet Silverado 2500 HD; 2001 to 2005 Chevrolet Silverado 3500; 2001 to 2005 GMC Sierra 2500 HD....

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    $879.99 - $879.99
    $879.99
    $879.99 - $879.99
    $879.99
    Select Options
  • Photo - Primary Photo - Primary

    ATS Diesel 2001-05 GM LCT1000 5-Speed Trim Valve Kit

    ATS Diesel
    $159.99 - $159.99
    $159.99
    $159.99 - $159.99
    $159.99

    Fits: 8 vehicle models, including 2001 to 2004 Chevrolet Silverado 2500 HD; 2001 to 2004 Chevrolet Silverado 3500; 2001 to 2004 GMC Sierra 2500 HD....

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    $159.99 - $159.99
    $159.99
    $159.99 - $159.99
    $159.99
  • Photo - Primary Photo - Primary

    ATS Diesel Allison Billet Input Shaft

    ATS Diesel
    $814.99 - $814.99
    $814.99
    $814.99 - $814.99
    $814.99

    Fits: 11 vehicle models, including 2001 to 2005, 2007 to 2010 Chevrolet Silverado 2500 HD; 2001 to 2005, 2007 to 2010 GMC Sierra 2500 HD; 2006 to 2...

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    $814.99 - $814.99
    $814.99
    $814.99 - $814.99
    $814.99
  • Photo - Primary Photo - Primary

    ATS Diesel GM Billet Flexplate (SFI 29.3)

    ATS Diesel
    $804.99 - $804.99
    $804.99
    $804.99 - $804.99
    $804.99

    Fits: 10 vehicle models, including 2001 to 2004, 2007 to 2010 Chevrolet Silverado 2500 HD; 2001 to 2004, 2007 to 2010 GMC Sierra 2500 HD; 2006 to 2...

    View full details
    $804.99 - $804.99
    $804.99
    $804.99 - $804.99
    $804.99
  • Photo - Primary Photo - Primary

    ATS Diesel 2001-2010 ATS manufactured Allison C5 clutch pack

    ATS Diesel
    $314.99 - $314.99
    $314.99
    $314.99 - $314.99
    $314.99

    Fits: 10 vehicle models, including 2001 to 2004, 2007 to 2010 Chevrolet Silverado 2500 HD; 2001 to 2004, 2007 to 2010 GMC Sierra 2500 HD; 2006 to 2...

    View full details
    $314.99 - $314.99
    $314.99
    $314.99 - $314.99
    $314.99

The LLY Duramax powered 2004.5 to 2005 Chevy Silverado HD and GMC Sierra HD trucks. It was the first Duramax with a variable geometry turbo and EGR, which helps it spool faster than the LB7.

Shop LLY Duramax Parts by Category

Not sure what fits? Send us your VIN or call 865.640.2097 and we will match the right part.

LLY Duramax FAQ

What is different about the LLY versus the LB7?

The LLY added a variable geometry turbo and EGR for faster spool and lower emissions.

Are LLY trucks known for overheating?

Some early LLY trucks ran hotter under load. Upgraded cooling parts are a common fix for trucks that tow heavy.