Skip to content
Free Shipping on most orders over $150.00. Buy now, pay later with ShopPay                    
Free Shipping on most orders over $150.00. Buy now, pay later with ShopPay                    

LLY Duramax Parts

Parts for the LLY Duramax (2004.5 to 2005).

Filters

  • ATS Diesel 2001-2010 ATS manufactured Allison C5 clutch pack

    ATS Diesel
    Original price $314.99 - Original price $314.99
    Original price
    $314.99
    $314.99 - $314.99
    Current price $314.99

    ATS Model 30880542482001-2010 Allison C5 clutch packApplication: 2001-2010 2500/3500 Duramax GM Light Duty Diesel

    Original price $314.99 - Original price $314.99
    Original price
    $314.99
    $314.99 - $314.99
    Current price $314.99
  • ATS Diesel GM Billet Flexplate (SFI 29.3)

    ATS Diesel
    Original price $804.99 - Original price $804.99
    Original price
    $804.99
    $804.99 - $804.99
    Current price $804.99

    ATS Model 3059004248SFI approved billet flexplates from ATS will hold up under the most extreme conditions. ATS billet flexplates are SFI approved,...

    View full details
    Original price $804.99 - Original price $804.99
    Original price
    $804.99
    $804.99 - $804.99
    Current price $804.99
  • ATS Diesel 06-07 6.6L LLY/LBZ/LMM Duramax Stage 4 Allison LCT100 Transmission Package

    ATS Diesel
    Original price $8,579.99 - Original price $8,579.99
    Original price
    $8,579.99
    $8,579.99 - $8,579.99
    Current price $8,579.99

    ATS Model 3098444308ATS Stage 4 Allison LCT1000 Transmission Package, 4WD, 2006-2007 6.6L LLY / LBZ / LMM Duramax. Includes: ATS 4WD 2006-2007 Al...

    View full details
    Original price $8,579.99 - Original price $8,579.99
    Original price
    $8,579.99
    $8,579.99 - $8,579.99
    Current price $8,579.99
  • ATS Diesel 06-07 6.6L LLY/LBZ/LMM Duramax Stage 3 Allison LCT100 Transmission Package

    ATS Diesel
    Original price $7,809.99 - Original price $7,809.99
    Original price
    $7,809.99
    $7,809.99 - $7,809.99
    Current price $7,809.99

    ATS Model 3098344308ATS Stage 3 Allison LCT1000 Transmission Package, 4WD, 2006-2007 6.6L LLY / LBZ / LMM Duramax. Includes: ATS 4WD 2006-2007 Al...

    View full details
    Original price $7,809.99 - Original price $7,809.99
    Original price
    $7,809.99
    $7,809.99 - $7,809.99
    Current price $7,809.99
  • ATS 2006-2007 6.6L LLY / LBZ / LMM Duramax Stage 1 Allison LCT1000 Transmission Package 4WD w/ PTO

    ATS Diesel
    Original price $5,794.99 - Original price $5,794.99
    Original price
    $5,794.99
    $5,794.99 - $5,794.99
    Current price $5,794.99

    ATS Model 3098154308ATS Stage 1 Allison LCT1000 Transmission Package, 4WD, w/ PTO, 2006-2007 6.6L LLY / LBZ / LMM Duramax. Includes: ATS 4WD w/ P...

    View full details
    Original price $5,794.99 - Original price $5,794.99
    Original price
    $5,794.99
    $5,794.99 - $5,794.99
    Current price $5,794.99
  • ATS Diesel 2001-05 GM LCT1000 5-Speed Trim Valve Kit

    ATS Diesel
    Original price $159.99 - Original price $159.99
    Original price
    $159.99
    $159.99 - $159.99
    Current price $159.99

    ATS Model 3039044248Serving truck enthusiasts for nearly two decades, ATS invents, designs, manufactures, and sells the world's most innovative die...

    View full details
    Original price $159.99 - Original price $159.99
    Original price
    $159.99
    $159.99 - $159.99
    Current price $159.99
  • ATS Diesel 01+ GM / 03+ Dodge 14-Bolt 11.5in American Axle ATS Protector Rear Differential Cover

    ATS Diesel
    Original price $289.99 - Original price $289.99
    Original price
    $289.99
    $289.99 - $289.99
    Current price $289.99

    ATS Model 4029156248ATS Protector Rear Differential Cover for AAM 14-Bolt 11.5 Inch. Cast aluminum construction with a black powdercoat finish. Kit...

    View full details
    Original price $289.99 - Original price $289.99
    Original price
    $289.99
    $289.99 - $289.99
    Current price $289.99
  • ATS Diesel 2000 - Early 05 Dodge 2wd NV5600 Trans

    ATS Diesel
    Original price $5,524.99 - Original price $5,524.99
    Original price
    $5,524.99
    $5,524.99 - $5,524.99
    Current price $5,524.99

    ATS Model 3119622236ATS Built NV5600 6-Speed Manual Trans, 2000-Early 2005 Dodge 2WDDetails: ATS NV5600 Transmission 6-Speed Manual Cast Iron Case...

    View full details
    Original price $5,524.99 - Original price $5,524.99
    Original price
    $5,524.99
    $5,524.99 - $5,524.99
    Current price $5,524.99
  • Fleece Performance 01-19 GM 2500/3500 Allison LCT/GM 4T65-E Internal Harness Connector & Seal (7pk)

    Fleece Performance
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $139.99
    $139.99 - $139.99
    Current price $139.99

    Fleece Performance Model FPE-HAR-GM-LCT-SEAL-7PGet rid of oil leaks from the harness connector with our replacement internal wiring harness seal fo...

    View full details
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $139.99
    $139.99 - $139.99
    Current price $139.99
  • Exergy Dodge Cummins 6.7L/Chevrolet Duramax LLY/LBZ/LMM 1800 Bar (26000 PSI) Pressure Relief Valve

    Exergy
    Original price $240.00 - Original price $240.00
    Original price
    $240.00
    $240.00 - $240.00
    Current price $240.00

    Exergy Dodge Cummins 6.7L/Chevrolet Duramax LLY/LBZ/LMM 1800 Bar (26000 PSI) Pressure Relief Valve. Sold and shipped by Powerhouse Diesel, a diesel...

    View full details
    Original price $240.00 - Original price $240.00
    Original price
    $240.00
    $240.00 - $240.00
    Current price $240.00
  • Exergy Cummins 6.7L/Duramax LLY/LBZ/LMM 2400 Bar (34800 PSI) Pressure Relief Valve *RACE*

    Exergy
    Original price $300.00 - Original price $300.00
    Original price
    $300.00
    $300.00 - $300.00
    Current price $300.00

    Exergy Cummins 6.7L/Duramax LLY/LBZ/LMM 2400 Bar (34800 PSI) Pressure Relief Valve RACE. Sold and shipped by Powerhouse Diesel, a diesel repair and...

    View full details
    Original price $300.00 - Original price $300.00
    Original price
    $300.00
    $300.00 - $300.00
    Current price $300.00
  • Exergy Cummins 6.7L/Duramax LLY/LBZ/LMM 2600 Bar (37700 PSI) Pressure Relief Valve

    Exergy
    Original price $320.00 - Original price $320.00
    Original price
    $320.00
    $320.00 - $320.00
    Current price $320.00

    Exergy Cummins 6.7L/Duramax LLY/LBZ/LMM 2600 Bar (37700 PSI) Pressure Relief Valve. Sold and shipped by Powerhouse Diesel, a diesel repair and perf...

    View full details
    Original price $320.00 - Original price $320.00
    Original price
    $320.00
    $320.00 - $320.00
    Current price $320.00
  • Exergy Dodge Cummins 6.7L/Chevrolet Duramax LLY/LBZ/LMM 2000 Bar (29000 PSI) Pressure Relief Valve

    Exergy
    Original price $240.00 - Original price $240.00
    Original price
    $240.00
    $240.00 - $240.00
    Current price $240.00

    Exergy Dodge Cummins 6.7L/Chevrolet Duramax LLY/LBZ/LMM 2000 Bar (29000 PSI) Pressure Relief Valve. Sold and shipped by Powerhouse Diesel, a diesel...

    View full details
    Original price $240.00 - Original price $240.00
    Original price
    $240.00
    $240.00 - $240.00
    Current price $240.00
  • Kicker Bar Kit | 6 Inch Lift | Chevy/GMC 2500HD 4WD (01-10)

    Rough Country
    Original price $129.95 - Original price $129.95
    Original price
    $129.95
    $129.95 - $129.95
    Current price $129.95

    Kicker braces add rigidity to the front crossmember assembly and are highly recommended for aggressive off road use.

    Original price $129.95 - Original price $129.95
    Original price
    $129.95
    $129.95 - $129.95
    Current price $129.95
  • Carrier Bearing Drop Kit | Chevy/GMC 2500HD 2WD/4WD (01-10)

    Rough Country
    Original price $29.95 - Original price $29.95
    Original price
    $29.95
    $29.95 - $29.95
    Current price $29.95

    Carrier bearing drop kit required for 01-06 1500 HD Pickups with 2-piece drive shafts.

    Original price $29.95 - Original price $29.95
    Original price
    $29.95
    $29.95 - $29.95
    Current price $29.95
  • LED Light Mounts | Upper Windshield | 54" Curved | Chevy/GMC 1500 (99-06 & Classic)

    Rough Country
    Original price $49.95 - Original price $49.95
    Original price
    $49.95
    $49.95 - $49.95
    Current price $49.95

    Ride proudly into the night with Rough Country's 54-inch Curved LED Upper Windshield Light Bar Mounts for 99-06 GM Pickups & SUV's. Our durable...

    View full details
    Original price $49.95 - Original price $49.95
    Original price
    $49.95
    $49.95 - $49.95
    Current price $49.95
  • HD Tie Rod Sleeves | Chevy/GMC 1500/2500HD/Tahoe/Yukon 4WD

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

    One area seriously lacking on most GM trucks is the steering link. With an outside diameter of only 1/2in, one wrong turn can easily bend the tie r...

    View full details
    Original price $39.95 - Original price $39.95
    Original price
    $39.95
    $39.95 - $39.95
    Current price $39.95
  • 2 Inch Leveling Kit | Shock Ext | Chevy/GMC 2500HD (01-10)

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

    Crank it up with Rough Country;s 2001-2010 Torsion Bar Leveling Kit. Featuring a set of durable, forged Torsion bar Keys and shock extension bracke...

    View full details
    Original price $99.95 - Original price $99.95
    Original price
    $99.95
    $99.95 - $99.95
    Current price $99.95
  • Exergy Duramax CP3 Rear Outlet Fitting & Plug Kit

    Exergy
    Original price $64.00 - Original price $64.00
    Original price
    $64.00
    $64.00 - $64.00
    Current price $64.00

    Exergy Duramax CP3 Rear Outlet Fitting & Plug Kit. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in Knoxville, TN...

    View full details
    Original price $64.00 - Original price $64.00
    Original price
    $64.00
    $64.00 - $64.00
    Current price $64.00
  • Wehrli 2001-2007 Duramax LB7/LLY/LBZ Allison 4x4 Transfer Case Brace - WCFab Red

    Wehrli
    Original price $204.00
    Original price $204.00 - Original price $204.00
    Original price $204.00
    Current price $203.70
    $203.70 - $203.70
    Current price $203.70

    Wehrli Model WCF1001302001-2007 LB7/LLY/LBZ Duramax Allison Transfer Case Braces have been developed and tested for use on high horsepower Duramax ...

    View full details
    Original price $204.00
    Original price $204.00 - Original price $204.00
    Original price $204.00
    Current price $203.70
    $203.70 - $203.70
    Current price $203.70
    Save 0% Save %
  • 1" Rear Block Kit - GM Truck

    ReadyLift
    Original price $159.95 - Original price $159.95
    Original price
    $159.95
    $159.95 - $159.95
    Current price $159.95

    Readylift Model 66-3051 QUICK OVERVIEW Chevy/GMC 1" OEM Style Rear Block Kit Single Rear Wheel Only (will not fit Dually) OEM style cast iron with...

    View full details
    Original price $159.95 - Original price $159.95
    Original price
    $159.95
    $159.95 - $159.95
    Current price $159.95
  • Wehrli LB7 / LLY / LBZ Duramax MAF Sensor Aluminum Weld Bung

    Wehrli
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $33.95
    $33.95 - $33.95
    Current price $33.95

    Wehrli Model WCF205-26Wehrli LB7 / LLY / LBZ Duramax MAF Sensor Aluminum Weld Bung

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $33.95
    $33.95 - $33.95
    Current price $33.95
  • Kryptonite Traction Bar Rebuild Kit For 2001 to 2010 Chevy/GMC HP Trucks

    Kryptonite
    Original price $66.49 - Original price $66.49
    Original price
    $66.49
    $66.49 - $66.49
    Current price $66.49

    Fits; KRTB10 Part# KRTB10-R Death Grip Full Floating Traction Bar Rebuild Kit replaces all bushings and bump stops on your existing Traction bar k...

    View full details
    Original price $66.49 - Original price $66.49
    Original price
    $66.49
    $66.49 - $66.49
    Current price $66.49
  • WeatherTech Rubber Mats Rear Tan for 1999 to 2006 Chevy C K Series Silverado Avalanche and GMC C K Series Sierra W26TN-W20TN

    WeatherTech
    Original price $147.90 - Original price $147.90
    Original price
    $147.90
    $147.90 - $147.90
    Current price $147.90

    The WeatherTech All-Weather Floor Mats have deeply sculpted channels designed to trap water, road salt, mud and sand. They wont curl, crack or har...

    View full details
    Original price $147.90 - Original price $147.90
    Original price
    $147.90
    $147.90 - $147.90
    Current price $147.90

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.