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LLY Duramax Engine Parts

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    Fleece Performance 01-19 GM 2500/3500 Allison LCT/GM 4T65-E Internal Harness Connector & Seal (7pk)

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $139.99
    $139.99 - $139.99
    $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...

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    $0.00 - $0.00
    $0.00
    $139.99
    $139.99 - $139.99
    $139.99
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    Wehrli 2001-2007 Duramax LB7/LLY/LBZ Allison 4x4 Transfer Case Brace - WCFab Red

    Wehrli
    $204.00
    $204.00 - $204.00
    $204.00
    $203.70
    $203.70 - $203.70
    $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 ...

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    $204.00
    $204.00 - $204.00
    $204.00
    $203.70
    $203.70 - $203.70
    $203.70
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    Fleece Performance 01-19 GM 2500/3500 34V Duramax Billet Rocker Arm Bridges

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $512.54
    $512.54 - $512.54
    $512.54

    Fleece Performance Model FPE-BRAB-D1Fleece Performance billet rocker arm bridges for the GM Duramax. These bridges offer a massive 2.5-time strengt...

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    $0.00 - $0.00
    $0.00
    $512.54
    $512.54 - $512.54
    $512.54
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    Exergy Rail Fitting for HP Line into PRV Location LLY/LBZ/LMM & Cummins 6.7L

    Exergy
    $77.00 - $77.00
    $77.00
    $77.00 - $77.00
    $77.00

    Exergy Rail Fitting for HP Line into PRV Location LLY/LBZ/LMM & Cummins 6.7L. Sold and shipped by Powerhouse Diesel, a diesel repair and perfor...

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    $77.00 - $77.00
    $77.00
    $77.00 - $77.00
    $77.00
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    Exergy Port to Female M18x1.5 Cummins 6.7 / Duramax LLY/LBZ/LMM

    Exergy
    $116.00 - $116.00
    $116.00
    $116.00 - $116.00
    $116.00

    Exergy Port to Female M18x1.5 Cummins 6.7 / Duramax LLY/LBZ/LMM. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in Kno...

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    $116.00 - $116.00
    $116.00
    $116.00 - $116.00
    $116.00
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    Exergy PRV Plug w/O-Ring Cummins 6.7L/LLY/LBZ/LMM (Diagnostic Purposes Only)

    Exergy
    $64.00 - $64.00
    $64.00
    $64.00 - $64.00
    $64.00

    Exergy PRV Plug without Ring Cummins 6.7L/LLY/LBZ/LMM (Diagnostic Purposes Only). Sold and shipped by Powerhouse Diesel, a diesel repair and perfor...

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    $64.00 - $64.00
    $64.00
    $64.00 - $64.00
    $64.00
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    Wehrli LB7/LLY/LBZ/LMM Duramax S400 Twin/Compound Turbo Oil Line Kit

    Wehrli
    $0.00 - $0.00
    $0.00
    $198.85
    $198.85 - $198.85
    $198.85

    Wehrli Model WCF100378Wehrli LB7/LLY/LBZ/LMM Duramax S400 Twin/Compound Turbo Oil Line Kit -Stainless Braided #8 Drain Line 30"-Stainless Braided #...

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    $0.00 - $0.00
    $0.00
    $198.85
    $198.85 - $198.85
    $198.85
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    Wehrli 2001+ GM Duramax LB7/LLY/LBZ/LMM/LML/L5P Billet Oil Fill Cap - Black Anodized

    Wehrli
    $0.00 - $0.00
    $0.00
    $51.41
    $51.41 - $51.41
    $51.41

    Wehrli Model WCF100443Wehrli 2001+ GM Duramax LB7/LLY/LBZ/LMM/LML/L5P Billet Oil Fill Cap - Black Anodized -CNC Machined Billet Aluminum GM factory...

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    $0.00 - $0.00
    $0.00
    $51.41
    $51.41 - $51.41
    $51.41
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    Wehrli 04.5-10 Duramax LLY/LBZ/LMM Billet Upper Valve Cover Set

    Wehrli
    $0.00 - $0.00
    $0.00
    $363.75
    $363.75 - $363.75
    $363.75

    Wehrli Model WCF100415 WCFab Billet Aluminum Upper Valve Cover sets fit LLY, LBZ, and LMM Duramax and are a great way to clean up your engine's app...

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    $0.00 - $0.00
    $0.00
    $363.75
    $363.75 - $363.75
    $363.75
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    Wehrli 01-10 Chevrolet 6.6L Duramax Valley CP3 Block Off Plate

    Wehrli
    $0.00 - $0.00
    $0.00
    $72.75
    $72.75 - $72.75
    $72.75

    Wehrli Model WCF100024Billet Block Off plate for valley CP3 pump. Black anodized finish with engraved logo.

    $0.00 - $0.00
    $0.00
    $72.75
    $72.75 - $72.75
    $72.75
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    Fleece Performance GM Silverado/Sierra 2500/3500 6.6L LLY Duramax Vane Position Sensor Pigtail

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $28.99
    $28.99 - $28.99
    $28.99

    Fleece Performance Model FPE-HAR-DMAX-VPS-0405Replacement connector with 6 inch pigtail for use on the 6.6L Duramax turbocharger vane position sens...

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    $0.00 - $0.00
    $0.00
    $28.99
    $28.99 - $28.99
    $28.99
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    Fleece Performance 01-16 GM 2500/3500 Duramax Billet Oil Cap Cover - Red

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $39.99
    $39.99 - $39.99
    $39.99

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

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    $0.00 - $0.00
    $0.00
    $39.99
    $39.99 - $39.99
    $39.99
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    Fleece Performance 01-16 GM 2500/3500 Duramax Billet Oil Cap Cover - Blue

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $39.99
    $39.99 - $39.99
    $39.99

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

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    $0.00 - $0.00
    $0.00
    $39.99
    $39.99 - $39.99
    $39.99
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    Fleece Performance 01-13 GM Duramax 6.6L 1.5in T4 Pedestal Spacer

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $119.74
    $119.74 - $119.74
    $119.74

    Fleece Performance Model FPE-T4PED-SPACER1.5This black 1.5in T4 Pedestal Spacer is designed for use with T4 Turbos installed on Duramax engines whe...

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    $0.00 - $0.00
    $0.00
    $119.74
    $119.74 - $119.74
    $119.74
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    Fleece Performance 01-07 GM Duramax/11-16 GM 2500/3500 Duramax Oil Cooler Adapter Kit

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $99.00
    $99.00 - $99.00
    $99.00

    Fleece Performance Model FPE-DMAX-OCADPTProblem: The original equipment oil cooler adapter relies on a metal gasket on the oil cooler that over tim...

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    $0.00 - $0.00
    $0.00
    $99.00
    $99.00 - $99.00
    $99.00
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    Fleece Performance 01-07 GM 2500/3500 Duramax Vane Position Sensor Pigtail (LLY)

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $27.99
    $27.99 - $27.99
    $27.99

    Fleece Performance Model FPE-HAR-DMAX-MAP-0107Replacement connector with 6 inch pigtail for use on the 6.6L Duramax engine including MAP, BARO, cam...

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    $0.00 - $0.00
    $0.00
    $27.99
    $27.99 - $27.99
    $27.99
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    Fleece Performance 01-05 GM Duramax 6.6L LB7/LLY Allison Transmission Cooler Lines

    Fleece Performance
    $0.00 - $0.00
    $0.00
    $289.99
    $289.99 - $289.99
    $289.99

    Fleece Performance Model FPE-TL-LB7-LLY Replace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. Our ki...

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    $0.00 - $0.00
    $0.00
    $289.99
    $289.99 - $289.99
    $289.99
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    Exergy 04.5-10 Chevrolet Duramax 6.6L LLY/LBZ/LMM Seal Kit (O-Ring & Copper Gasket) - Set of 8

    Exergy
    $60.00 - $60.00
    $60.00
    $60.00 - $60.00
    $60.00

    Exergy 2004.5 to 2010 Chevrolet Duramax 6.6L LLY/LBZ/LMM Seal Kit (O Ring & Copper Gasket), Set of 8. Sold and shipped by Powerhouse Diesel, a ...

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    $60.00 - $60.00
    $60.00
    $60.00 - $60.00
    $60.00
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    ARP Duramax 6.6L LBZ/LLY/LML/LMM Hex Valve Cover Bolt Kit - Polished Stainless Steel

    ARP
    $186.06 - $186.06
    $186.06
    $186.06 - $186.06
    $186.06

    ARP Duramax 6.6L LBZ/LLY/LML/LMM Hex Valve Cover Bolt Kit, Polished Stainless Steel. Sold and shipped by Powerhouse Diesel, a diesel repair and per...

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    $186.06 - $186.06
    $186.06
    $186.06 - $186.06
    $186.06
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    ARP Duramax 6.6L LBZ/LLY/LML/LMM 12pt Valve Cover Bolt Kit | Part 400-7533

    ARP
    $208.69 - $208.69
    $208.69
    $208.69 - $208.69
    $208.69

    ARP Duramax 6.6L LBZ/LLY/LML/LMM 12pt Valve Cover Bolt Kit. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in Knoxvill...

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    $208.69 - $208.69
    $208.69
    $208.69 - $208.69
    $208.69
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    ARP Duramax 6.6L LBZ/LLY/LML/LMM 12pt Valve Cover Bolt Kit | Part 100-7533

    ARP
    $148.16 - $148.16
    $148.16
    $148.16 - $148.16
    $148.16

    ARP Duramax 6.6L LBZ/LLY/LML/LMM 12pt Valve Cover Bolt Kit. Sold and shipped by Powerhouse Diesel, a diesel repair and performance shop in Knoxvill...

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    $148.16 - $148.16
    $148.16
    $148.16 - $148.16
    $148.16
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    Mishimoto Aluminum Intercooler Pipe & Boot Kit 2002*-2004 LB7 - NOT 2001 MODEL

    Mishimoto
    $561.00
    $561.00 - $561.00
    $561.00
    $509.95
    $509.95 - $509.95
    $509.95

    The Mishimoto 6.6L Duramax intercooler pipe and boot kit is an ideal upgrade in reliability and performance.The Mishimoto kit features polished al...

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    $561.00
    $561.00 - $561.00
    $561.00
    $509.95
    $509.95 - $509.95
    $509.95
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    BD Diesel Throttle Sensitivity Booster - Chevy 2001-2005 6.6L Duramax LB7

    BD Diesel
    $281.25 - $281.25
    $281.25
    $289.95
    $289.95 - $289.95
    $289.95

    By reducing pedal lag, the Throttle Sensitivity Booster forces your performance curve to occur sooner, achieving quicker engine response and a...

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    $281.25 - $281.25
    $281.25
    $289.95
    $289.95 - $289.95
    $289.95
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    Yukon Spindle Nut for GM 10.5in 14 Bolt Truck 1.935in I.D 6 Holes

    Yukon Gear & Axle
    $86.89 - $86.89
    $86.89
    $86.89 - $86.89
    $86.89

    Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts...

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    $86.89 - $86.89
    $86.89
    $86.89 - $86.89
    $86.89

LLY Duramax engine parts for 2004.5 to 2005 Chevy Silverado HD and GMC Sierra HD trucks.

The LLY brought the first variable geometry turbo and EGR to the Duramax. Head gaskets, heat management and EGR parts are the usual LLY engine repairs, with head studs recommended for higher power.

Related: LLY fuel injectors, LLY fuel system, LLY tuning. Browse all LLY Duramax parts.

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