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LLY Duramax Parts

Parts for the LLY Duramax (2004.5 to 2005).

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  • S&S Diesel Motorsport Duramax 12mm CP3 (1,590 mm3 /rev displacement) -New

    S&S
    Original price $2,644.00 - Original price $2,644.00
    Original price
    $2,644.00
    $2,644.00 - $2,644.00
    Current price $2,644.00

    S&S Model CP3-DMX-12S&S Diesel Motorsport Duramax 12mm CP3 (1,590 mm3 /rev displacement) | New LBZ-based. 2001-2010 Duramax Trucks 2001-200...

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    Original price $2,644.00 - Original price $2,644.00
    Original price
    $2,644.00
    $2,644.00 - $2,644.00
    Current price $2,644.00
  • S&S DBV4 Single Stage Relief Valve, Internal Return, 2700 Bar | LLY, LBZ, LMM

    S&S
    Original price $325.00 - Original price $325.00
    Original price
    $325.00
    $325.00 - $325.00
    Current price $325.00

    S&S DBV4 Single Stage Relief Valve, Internal Return, 2700 Bar for the LLY, LBZ, LMM. Sold and shipped by Powerhouse Diesel, a diesel repair and...

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    Original price $325.00 - Original price $325.00
    Original price
    $325.00
    $325.00 - $325.00
    Current price $325.00
  • S&S Diesel Motorsport DBV4 Single Stage Relief Valve Internal Return, LLY/LBZ/LMM, 6.7 style - 2200bar

    S&S
    Original price $299.00 - Original price $299.00
    Original price
    $299.00
    $299.00 - $299.00
    Current price $299.00

    S&S Model PRV-I-2200-1SDBV4 Single Stage Relief Valve Internal Return, LLY/LBZ/LMM, 6.7 style - 2200bar Generic Image

    Original price $299.00 - Original price $299.00
    Original price
    $299.00
    $299.00 - $299.00
    Current price $299.00
  • S&S DBV4 2 Stage Relief Valve, Internal Return, 2400 Bar | LLY, LBZ, LMM

    S&S
    Original price $312.00 - Original price $312.00
    Original price
    $312.00
    $312.00 - $312.00
    Current price $312.00

    S&S DBV4 2 Stage Relief Valve, Internal Return, 2400 Bar for the LLY, LBZ, LMM. Sold and shipped by Powerhouse Diesel, a diesel repair and perf...

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    Original price $312.00 - Original price $312.00
    Original price
    $312.00
    $312.00 - $312.00
    Current price $312.00
  • Yukon Unit Bearing & Hub Assembly for 99-14 GM 1/2 Ton Front

    Yukon Gear & Axle
    Original price $227.89 - Original price $227.89
    Original price
    $227.89
    $227.89 - $227.89
    Current price $227.89

    Enhanced Safety: Rest easy knowing that the YB U515036 hub assembly meets or exceeds OE standards, keeping you and your passengers safe on the road...

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    Original price $227.89 - Original price $227.89
    Original price
    $227.89
    $227.89 - $227.89
    Current price $227.89
  • Fleece Replacement Transmission Line, Medium | 2001 to 2005 GM 2500 3500 Duramax

    Fleece Performance
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $99.99
    $99.99 - $99.99
    Current price $99.99

    Fleece Performance Model FPE-TL-LB7-LMM-MED-SERFleece Performance 01-05 GM 2500/3500 Duramax Replacement Transmission Line (LB7/LMM) - Medium Line ...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $99.99
    $99.99 - $99.99
    Current price $99.99
  • Rough Country 6 Inch Lift Kit | 1999 to 2004 GM 2500 4WD

    Rough Country
    Original price $1,299.95 - Original price $1,299.95
    Original price
    $1,299.95
    $1,299.95 - $1,299.95
    Current price $1,299.95

    Rough Country's 6 inch suspension lift for 1999 to 2004 GM 2500 4WD, built to run up to 35 inch tires with factory like ride quality. Part number:...

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    Original price $1,299.95 - Original price $1,299.95
    Original price
    $1,299.95
    $1,299.95 - $1,299.95
    Current price $1,299.95
  • Rough Country M14 x 1.5 Lug Nuts, Set of 32 | Chrome, Open End

    Rough Country
    Original price $39.95 - Original price $39.95
    Original price
    $39.95
    $39.95 - $39.95
    Current price $39.95

    Rough Country M14 x 1.5 Lug Nuts, Set of 32. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in Knoxville, TN. Part nu...

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    Original price $39.95 - Original price $39.95
    Original price
    $39.95
    $39.95 - $39.95
    Current price $39.95
  • 9/16 x 18 Lug Nut Set of 32 | Black

    Rough Country
    Original price $39.95 - Original price $39.95
    Original price
    $39.95
    $39.95 - $39.95
    Current price $39.95

    Secure your new wheels with Rough Countrys Bulge Acorn Style Lug Nuts. These cold-forged lug nuts are plated with a beautiful chrome finish for a l...

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    Original price $39.95 - Original price $39.95
    Original price
    $39.95
    $39.95 - $39.95
    Current price $39.95
  • Rough Country 2 Inch Leveling Kit | 2001 to 2010 GM 2500HD

    Rough Country
    Original price $79.95 - Original price $99.95
    Original price
    $79.95
    $79.95 - $99.95
    Current price $79.95

    Crank it up with Rough Country;s 2001-2010 Torsion Bar Leveling Kit. Featuring a set of durable, forged Torsion bar Keys, this kit affords you plen...

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    Original price $79.95 - Original price $99.95
    Original price
    $79.95
    $79.95 - $99.95
    Current price $79.95
  • 2" Rear Block Kit - GM Truck

    ReadyLift
    Original price $169.95 - Original price $169.95
    Original price
    $169.95
    $169.95 - $169.95
    Current price $169.95

    Readylift Model 66-3052 QUICK OVERVIEW Chevy/GMC 2" OEM Style Rear Block Kit for 1988-98 GM 1500 2000-2010 GM HD 2500/3500 8-lug Includes new longe...

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    Original price $169.95 - Original price $169.95
    Original price
    $169.95
    $169.95 - $169.95
    Current price $169.95
  • Wehrli LB7/LLY/LBZ/LMM Duramax Upper Coolant Pipe Plug

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $40.74
    $40.74 - $40.74
    Current price $40.74

    Wehrli Model WCF205-280Wehrli LB7/LLY/LBZ/LMM Duramax Upper Coolant Pipe Plug

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $40.74
    $40.74 - $40.74
    Current price $40.74
  • Wehrli LLY / LBZ / LMM Duramax Turbo Compressor Inlet Billet Steel Flange

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $38.80
    $38.80 - $38.80
    Current price $38.80

    Wehrli LLY / LBZ / LMM Duramax Turbo Compressor Inlet Billet Steel Flange. Sold and shipped by Powerhouse Diesel, a diesel repair and performance s...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $38.80
    $38.80 - $38.80
    Current price $38.80
  • Cold Air Intake For 04-05 Chevrolet Silverado GMC Sierra V8-6.6L LLY Duramax S&B

    S&B
    Original price $399.00 - Original price $399.00
    Original price
    $399.00
    $399.00 - $399.00
    Current price $399.00

    Maximum Performance Our cold air intake for the 2004-2005 Chevy / GMC Duramax LLY 6.6L was engineered to minimize air restriction and flows 44.63 p...

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    Original price $399.00 - Original price $399.00
    Original price
    $399.00
    $399.00 - $399.00
    Current price $399.00
  • Exergy 04.5-05 Chevrolet Duramax 6.6L LLY New Stock Replacement Left Hand Fuel Rail

    Exergy
    Original price $275.00 - Original price $275.00
    Original price
    $275.00
    $275.00 - $275.00
    Current price $275.00

    Exergy 2004.5 to 2005 Chevrolet Duramax 6.6L LLY New Stock Replacement Left Hand Fuel Rail. Sold and shipped by Powerhouse Diesel, a diesel repair ...

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    Original price $275.00 - Original price $275.00
    Original price
    $275.00
    $275.00 - $275.00
    Current price $275.00
  • Wehrli LB7/LLY/LBZ/LMM/LML Duramax S400 Single Turbo Oil Line Kit

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $290.03
    $290.03 - $290.03
    Current price $290.03

    Wehrli Model WCF100397 Complete Oil Line Kit for 2001-2016 LB7/LLY/LBZ/LMM/LML Duramax with S400 Turbo mounted on 6" tall pedestal. ***Also compati...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $290.03
    $290.03 - $290.03
    Current price $290.03
  • Wehrli 01-19 Chevrolet LB7/LLY/LBZ/LMM/LML/L5P Duramax Brake Master Cylinder Cover

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $145.50
    $145.50 - $145.50
    Current price $145.50

    Wehrli Model WCF100205Clean up the engine bay of your 2001-2019 Chevy Silverado or GMC Sierra 2500/3500 Duramax truck with this custom powder coate...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $145.50
    $145.50 - $145.50
    Current price $145.50
  • Wehrli Exhaust Manifold Kit with Gaskets | 2001 to 2016 Duramax

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $1,401.65
    $1,401.65 - $1,401.65
    Current price $1,401.65

    Wehrli Model WCF100363 Wehrli 01-16 Chevrolet Duramax Exhaust Manifold Kit w/ Gaskets & Hardware Fully TIG Welded, CNC machined billet steel ...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $1,401.65
    $1,401.65 - $1,401.65
    Current price $1,401.65
  • Wehrli Traction Bar Install Kit | 2001 to 2010 Duramax

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $276.45
    $276.45 - $276.45
    Current price $276.45

    Wehrli Model WCF100840 Built in house at WCFab our traction bar brackets bolt on to the bottom of the axle tube via the axle u-bolts and weld to th...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $276.45
    $276.45 - $276.45
    Current price $276.45
  • Wehrli 01-05 Duramax LB7/LLY Thermostat Housing Kit

    Wehrli
    Original price $524.00
    Original price $524.00 - Original price $524.00
    Original price $524.00
    Current price $474.33
    $474.33 - $474.33
    Current price $474.33

    Wehrli Model WCF100405 The Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for 2001-2005 LB7/LLY Duramax replaces the OEM upper rad...

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    Original price $524.00
    Original price $524.00 - Original price $524.00
    Original price $524.00
    Current price $474.33
    $474.33 - $474.33
    Current price $474.33
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  • Fleece Remote Turbo Oil Feed Line Kit | 2001 to 2016 Duramax

    Fleece Performance
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $99.99
    $99.99 - $99.99
    Current price $99.99

    Fleece Remote Turbo Oil Feed Line Kit for the 2001 to 2016 Duramax. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in ...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $99.99
    $99.99 - $99.99
    Current price $99.99
  • Fleece Performance 01-16 GM 2500/3500 Duramax Billet Oil Cap Cover - Black

    Fleece Performance
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $39.99
    $39.99 - $39.99
    Current price $39.99

    Fleece Performance Model FPE-DMAX-OC-BLKDress up your engine bay with our billet aluminum oil cap for the Chevy Duramax! Includes o-ring and cam-lo...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $39.99
    $39.99 - $39.99
    Current price $39.99
  • BD Diesel Manifold Exhaust - 2001-2010 Duramax

    BD Diesel
    Original price $191.04 - Original price $191.04
    Original price $191.04
    $203.95
    $203.95 - $203.95
    Current price $203.95

    The BD Full Bore Exhaust Manifold for the Chevy Duramax engine replaces factory driver's side "pinched down" unit, restoring exhaust flow and balan...

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    Original price $191.04 - Original price $191.04
    Original price $191.04
    $203.95
    $203.95 - $203.95
    Current price $203.95
  • BD Diesel Cool Down Timer Kit v2.0

    BD Diesel
    Original price $237.60 - Original price $237.60
    Original price $237.60
    $254.95
    $254.95 - $254.95
    Current price $254.95

    Turbochargers operate at high temperatures. The Cool Down Timer is designed to keep the engine running when the ignition is turned off to prevent t...

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    Original price $237.60 - Original price $237.60
    Original price $237.60
    $254.95
    $254.95 - $254.95
    Current price $254.95

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.