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LLY Duramax Parts

Parts for the LLY Duramax (2004.5 to 2005).

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  • Yukon Gear High Performance Gear Set For Dana 60 in a 4.88 Ratio

    Yukon Gear & Axle
    Original price $816.00 - Original price $816.00
    Original price
    $816.00
    $816.00 - $816.00
    Current price $816.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $816.00 - Original price $816.00
    Original price
    $816.00
    $816.00 - $816.00
    Current price $816.00
  • Yukon Gear High Performance Gear Set For Dana 60 in a 4.88 Ratio / Thick

    Yukon Gear & Axle
    Original price $780.00 - Original price $780.00
    Original price
    $780.00
    $780.00 - $780.00
    Current price $780.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $780.00 - Original price $780.00
    Original price
    $780.00
    $780.00 - $780.00
    Current price $780.00
  • Yukon Gear High Performance Gear Set For 10.5in GM 14 Bolt Truck in a 4.11 Ratio

    Yukon Gear & Axle
    Original price $711.00 - Original price $711.00
    Original price
    $711.00
    $711.00 - $711.00
    Current price $711.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $711.00 - Original price $711.00
    Original price
    $711.00
    $711.00 - $711.00
    Current price $711.00
  • Yukon Gear High Performance Gear Set For Dana 60 in a 4.56 Ratio / Thick

    Yukon Gear & Axle
    Original price $780.00 - Original price $780.00
    Original price
    $780.00
    $780.00 - $780.00
    Current price $780.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $780.00 - Original price $780.00
    Original price
    $780.00
    $780.00 - $780.00
    Current price $780.00
  • Yukon Gear High Performance Gear Set For 10.5in GM 14 Bolt Truck in a 3.73 Ratio

    Yukon Gear & Axle
    Original price $724.00 - Original price $724.00
    Original price
    $724.00
    $724.00 - $724.00
    Current price $724.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $724.00 - Original price $724.00
    Original price
    $724.00
    $724.00 - $724.00
    Current price $724.00
  • Yukon Gear High Performance Gear Set For 10.5in GM 14 Bolt Truck in a 4.56 Ratio

    Yukon Gear & Axle
    Original price $858.00 - Original price $858.00
    Original price
    $858.00
    $858.00 - $858.00
    Current price $858.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $858.00 - Original price $858.00
    Original price
    $858.00
    $858.00 - $858.00
    Current price $858.00
  • Yukon Gear Grizzly Locker For GM 10.5in 14T Differential 40 Spline 4.10-Down Ratio

    Yukon Gear & Axle
    Original price $1,401.00 - Original price $1,401.00
    Original price
    $1,401.00
    $1,401.00 - $1,401.00
    Current price $1,401.00

    Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and perform...

    View full details
    Original price $1,401.00 - Original price $1,401.00
    Original price
    $1,401.00
    $1,401.00 - $1,401.00
    Current price $1,401.00
  • Yukon Gear High Performance Gear Set For 10.5in GM 14 Bolt Truck in a 3.42 Ratio

    Yukon Gear & Axle
    Original price $858.00 - Original price $858.00
    Original price
    $858.00
    $858.00 - $858.00
    Current price $858.00

    Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing p...

    View full details
    Original price $858.00 - Original price $858.00
    Original price
    $858.00
    $858.00 - $858.00
    Current price $858.00
  • Yukon Gear Hardcore Diff Cover for 11.5in & 11.8in GM Dodge Ram

    Yukon Gear & Axle
    Original price $415.00 - Original price $415.00
    Original price
    $415.00
    $415.00 - $415.00
    Current price $415.00

    Yukon Hardcore Diff Covers are constructed from thick-walled, high-strength nodular steel to protect lockers, gears and axles from the most extreme...

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    Original price $415.00 - Original price $415.00
    Original price
    $415.00
    $415.00 - $415.00
    Current price $415.00
  • Yukon Gear Hardcore Diff Cover for 14 Bolt GM Rear w/ 8mm Cover Bolts

    Yukon Gear & Axle
    Original price $453.00 - Original price $453.00
    Original price
    $453.00
    $453.00 - $453.00
    Current price $453.00

    Yukon Hardcore Diff Covers are constructed from thick-walled, high-strength nodular steel to protect lockers, gears and axles from the most extreme...

    View full details
    Original price $453.00 - Original price $453.00
    Original price
    $453.00
    $453.00 - $453.00
    Current price $453.00
  • Yukon Gear Grizzly Locker For GM & Chrysler 11.5in w/ 30 Spline Axles

    Yukon Gear & Axle
    Original price $2,646.00 - Original price $2,646.00
    Original price
    $2,646.00
    $2,646.00 - $2,646.00
    Current price $2,646.00

    Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and perform...

    View full details
    Original price $2,646.00 - Original price $2,646.00
    Original price
    $2,646.00
    $2,646.00 - $2,646.00
    Current price $2,646.00
  • Yukon Gear Grizzly Locker For GM & Chrysler 11.5in w/ 38 Spline Axles

    Yukon Gear & Axle
    Original price $3,142.00 - Original price $3,142.00
    Original price
    $3,142.00
    $3,142.00 - $3,142.00
    Current price $3,142.00

    Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and perform...

    View full details
    Original price $3,142.00 - Original price $3,142.00
    Original price
    $3,142.00
    $3,142.00 - $3,142.00
    Current price $3,142.00
  • Yukon Gear Grizzly Locker For GM 10.5in 14 Bolt Truck w/ 30 Spline Axles

    Yukon Gear & Axle
    Original price $1,305.00 - Original price $1,305.00
    Original price
    $1,305.00
    $1,305.00 - $1,305.00
    Current price $1,305.00

    Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and perform...

    View full details
    Original price $1,305.00 - Original price $1,305.00
    Original price
    $1,305.00
    $1,305.00 - $1,305.00
    Current price $1,305.00
  • Yukon Gear GM Side Gear Spacer Sleeve For GM 9.25in IFS

    Yukon Gear & Axle
    Original price $62.00 - Original price $62.00
    Original price
    $62.00
    $62.00 - $62.00
    Current price $62.00

    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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    Original price $62.00 - Original price $62.00
    Original price
    $62.00
    $62.00 - $62.00
    Current price $62.00
  • Yukon Gear GM 9.25 IFS Side Seal / 1998+

    Yukon Gear & Axle
    Original price $49.00 - Original price $49.00
    Original price
    $49.00
    $49.00 - $49.00
    Current price $49.00

    Yukon Mighty Seals use the latest design and manufacturing technologies to produce a precision fit that seals tight and lasts for years to come.Ins...

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    Original price $49.00 - Original price $49.00
    Original price
    $49.00
    $49.00 - $49.00
    Current price $49.00
  • Yukon Gear Finned Aluminum Cover For Dodge & GM 11.5in

    Yukon Gear & Axle
    Original price $608.00 - Original price $608.00
    Original price
    $608.00
    $608.00 - $608.00
    Current price $608.00

    These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polish...

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    Original price $608.00 - Original price $608.00
    Original price
    $608.00
    $608.00 - $608.00
    Current price $608.00
  • Yukon Gear Eaton-Type 14 Plate Carbon Clutch Set For 9.5in GM and 9.75in Ford

    Yukon Gear & Axle
    Original price $587.00 - Original price $587.00
    Original price
    $587.00
    $587.00 - $587.00
    Current price $587.00

    Yukon Gear & Axle spider gear kits feature higher quality materials and better manufacturing techniques than OEM to ensure a longer lasting spi...

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    Original price $587.00 - Original price $587.00
    Original price
    $587.00
    $587.00 - $587.00
    Current price $587.00
  • Yukon Gear Eaton-Type Positraction Carbon Clutch Kit w/ 14 Plates For GM 14T and 10.5in

    Yukon Gear & Axle
    Original price $519.00 - Original price $519.00
    Original price
    $519.00
    $519.00 - $519.00
    Current price $519.00

    Yukon Gear & Axle clutch kits fit popular GM diffs outfitted with a Yukon Dura Grip positraction unit feature 14 advanced carbon clutch plates,...

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    Original price $519.00 - Original price $519.00
    Original price
    $519.00
    $519.00 - $519.00
    Current price $519.00
  • Yukon Gear Dura Grip For GM & Chrysler 11.5in / 30 Spline

    Yukon Gear & Axle
    Original price $2,588.00 - Original price $2,588.00
    Original price
    $2,588.00
    $2,588.00 - $2,588.00
    Current price $2,588.00

    Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance...

    View full details
    Original price $2,588.00 - Original price $2,588.00
    Original price
    $2,588.00
    $2,588.00 - $2,588.00
    Current price $2,588.00
  • Yukon Gear Eaton Positraction Shim Kit For 10.5in GM 14 Bolt Truck

    Yukon Gear & Axle
    Original price $120.00 - Original price $120.00
    Original price
    $120.00
    $120.00 - $120.00
    Current price $120.00

    This Yukon Gear & Axle shim kit is designed for GM 14T differentials outfitted with an Eaton positraction unit.Installation InstructionsInstall...

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    Original price $120.00 - Original price $120.00
    Original price
    $120.00
    $120.00 - $120.00
    Current price $120.00
  • Yukon Gear Dura Grip Positraction For GM 9.5in w/ 33 Spline Axles

    Yukon Gear & Axle
    Original price $1,543.00 - Original price $1,543.00
    Original price
    $1,543.00
    $1,543.00 - $1,543.00
    Current price $1,543.00

    Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance...

    View full details
    Original price $1,543.00 - Original price $1,543.00
    Original price
    $1,543.00
    $1,543.00 - $1,543.00
    Current price $1,543.00
  • Yukon Gear Dura Grip Positraction For 10.5in GM 14 Bolt Truck / 4.10 & Down

    Yukon Gear & Axle
    Original price $1,825.00 - Original price $1,825.00
    Original price
    $1,825.00
    $1,825.00 - $1,825.00
    Current price $1,825.00

    Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance...

    View full details
    Original price $1,825.00 - Original price $1,825.00
    Original price
    $1,825.00
    $1,825.00 - $1,825.00
    Current price $1,825.00
  • Yukon Gear Crush Sleeve Eliminator Kit For GM 10.5in 14 Bolt Truck

    Yukon Gear & Axle
    Original price $170.00 - Original price $170.00
    Original price
    $170.00
    $170.00 - $170.00
    Current price $170.00

    Crush sleeve eliminator kit for GM 10.5" 14 bolt truck. This kit contains a solid spacer & shim kit to eliminate the crush sleeve and set pinio...

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    Original price $170.00 - Original price $170.00
    Original price
    $170.00
    $170.00 - $170.00
    Current price $170.00
  • Yukon Gear Chrome Cover For 9.5in GM

    Yukon Gear & Axle
    Original price $113.00 - Original price $113.00
    Original price
    $113.00
    $113.00 - $113.00
    Current price $113.00

    These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.Installati...

    View full details
    Original price $113.00 - Original price $113.00
    Original price
    $113.00
    $113.00 - $113.00
    Current price $113.00

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.

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