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Used LBZ Duramax & 6.6 Duramax Engines for Sale

Used LBZ Duramax engines, and every other 6.6 Duramax from the LB7 to the L5P, for Chevrolet Silverado and GMC Sierra HD trucks, matched to your VIN. Tell us the year and model and one independent supplier quotes availability, price and shipping to Texas or anywhere in the lower 48.

Get a 6.6 Duramax Quote Call (214) 302-5584
  • Ships to all 48 contiguous states
  • Fitment checked by VIN
  • Free to ask
Illustrative used V8 engine on a white background, not a specific 6.6 Duramax unit
Illustrative image — the actual part may differ.
  • $2,450used, typical low end
  • 3vehicle lines listed
  • 2001earliest model year listed

6.6 Duramax Engine Price: Used vs Remanufactured

Used (typical range)Median
  • 2002 Chevrolet Silverado 2500 HD6.6L Turbo Diesel (VIN 1, 8th digit), California
    $3,525–$5,895median $5,895 · 39 listings
  • 2002 Chevrolet Silverado 2500 HD6.6L Turbo Diesel (VIN 1, 8th digit), Federal, Opt NF2
    $2,638–$8,076median $5,895 · 96 listings
  • 2005 Chevrolet Silverado 2500 HD6.6L Turbo Diesel (VIN 2, 8th digit)
    $2,450–$7,612median $3,500 · 97 listings
  • 2007 Chevrolet Silverado 2500 HDClassic Style (Creased Door Skin), 6.6L (VIN D, 8th digit, Opt LBZ)
    $3,250–$10,441median $7,612 · 100 listings
  • 2008 Chevrolet Silverado 2500 HD6.6L (VIN 6, 8th digit, Opt LMM)
    $3,000–$7,756median $4,500 · 100 listings
  • 2012 Chevrolet Silverado 2500 HD6.6L, VIN 8 (8th digit, Opt LML)
    $4,925–$8,113median $6,000 · 100 listings
  • 2018 Chevrolet Silverado 2500 HD6.6L (VIN Y, 8th digit, Opt L5P)
    $5,000–$6,998median $6,000 · 75 listings
  • 2021 Chevrolet Silverado 2500 HD(6.6L), Diesel (VIN Y, 8th digit, Opt L5P)
    $5,625–$8,000median $7,350 · 75 listings
Asking prices collected October 22, 2026 from U.S. used-yard listings and remanufacturer catalogs. A snapshot, not a quote.

Each used bar runs from the 25th to the 75th percentile of that version's asking prices, so half its listings fall inside it, and the dot marks the median. The supplier quotes your exact part, shipping and warranty.

These are part prices only. For labor and the total bill, see our engine replacement cost guide.

6.6 Duramax at a glance

Displacement6.6 L (6,599 cc; 402.7 cu in) 90° V8, 4.06 in bore × 3.90 in strokeSource: Wikipedia: Duramax V8 engine
ConstructionCast gray iron block, aluminum heads, overhead valves with 4 per cylinder, high-pressure common-rail direct injectionSource: Wikipedia: Duramax V8 engine
Engine codesLB7 (2001–2004), LLY (2004–2005), LBZ (2006–2007), LMM (2007–2010), LML (2011–2016), L5P (2017 on); LGH in vans and chassis cabsSource: Wikipedia: LB7, Wikipedia: LLY, Wikipedia: LLY/LBZ, Wikipedia: LMM, Wikipedia: LML, Wikipedia: L5P, Hollander: 2007 Silverado 2500 HD (LBZ, LMM by RPO), Hollander: 2012 Silverado 2500 HD (LML, LGH by RPO), Hollander: 2018 Silverado 2500 HD (L5P by RPO)
Output300 hp / 520 lb-ft (LB7) up to 470 hp / 975 lb-ft (L5P from the 2024 model year)Source: Wikipedia: LB7 specifications, Wikipedia: L5P Gen2
Compression17.5:1 on the LB7 and LLY; 16.8:1 from the LBZ onSource: Wikipedia: LB7 specifications, Wikipedia: LLY/LBZ

Which 6.6 Duramax do you have?

LBZ (VIN D, 2006–2007 Classic)

The most sought-after Duramax: a strengthened block, stronger rods and pistons, and no diesel particulate filter, since the DPF arrived with the LMM. Rated 360 hp and 650 lb-ft. The 2007 LBZ came only in the Classic (old-body) trucks. Some late-2005 and early-2006 LBZ engines carry VIN 2 and the LLY tune, and Hollander files the VIN 2 and VIN D 2006 engines under one number.

Source: Wikipedia: LLY/LBZ, Wikipedia: LBZ specifications, Hollander: 2006 Silverado 2500 HD 6.6L options, Hollander: 2007 Silverado 2500 HD 6.6L options

LB7 (VIN 1, 2001–2004)

The first Duramax, rated 300 hp and 520 lb-ft. Hollander splits it into two numbers by emissions option (Federal NF2 versus California or NF4), so give the supplier your full VIN.

Source: Wikipedia: LB7, Hollander: 2002 Silverado 2500 HD 6.6L options

LLY (VIN 2, 2004–2005)

Added a variable-geometry turbo and an EGR valve, rated 310 hp and 605 lb-ft. Its valve covers let a mechanic reach the injectors without removing them.

Source: Wikipedia: LLY, Hollander: 2005 Silverado 2500 HD 6.6L options

LMM (VIN 6, 2007–2010)

The new-body 2007 trucks onward, with a diesel particulate filter, rated 365 hp and 660 lb-ft. The Express van version is a separate Hollander number from the pickup engine.

Source: Wikipedia: LMM, Hollander: 2008 Silverado 2500 HD 6.6L options, Hollander: 2008 Express 2500 6.6L options

LML (VIN 8, 2011–2016) and LGH (VIN L)

The LML added a Bosch CP4 fuel pump, piezo injectors and DEF (urea) injection, rated 397 hp and 765 lb-ft. The LGH went into vans and 2011 chassis-cab HD trucks and has its own Hollander number.

Source: Wikipedia: LML, Wikipedia: LGH, Hollander: 2012 Silverado 2500 HD 6.6L options

L5P (VIN Y, 2017 on)

Rated 445 hp and 910 lb-ft, raised to 470 hp and 975 lb-ft for the 2024 model year. Hollander splits it into two part numbers; its yard donor records put mostly 2017–2019 trucks under one and 2020-on trucks under the other.

Source: Wikipedia: L5P, Hollander: 2018 Silverado 2500 HD 6.6L options, Hollander: 2021 Silverado 2500 HD 6.6L options
Same family is not the same part. Engines and transmissions in one family can differ in electronics, mounts and accessories. The supplier confirms fit with your VIN before you buy.

Check before you buy a used 6.6 Duramax

  • Read the 8th digit of your VIN. 1 is an LB7, 2 an LLY (or an early LBZ), D an LBZ, 6 an LMM, 8 an LML, L an LGH and Y an L5P.
  • Classic or new body for 2007? A 2007 Classic truck has the LBZ; a 2007 new-body truck has the LMM. They are different engines with different part numbers.
  • Pickup, van or chassis cab? Van and chassis-cab engines (LMM van, LGH) carry their own part numbers and lower ratings. Tell the supplier exactly what the engine came out of.
  • Match the emissions equipment. The LMM added a diesel particulate filter and the LML added DEF injection. Your truck's exhaust and controls must match the engine it was built with.
  • Get mileage, testing and warranty in writing. Ask for the donor truck's mileage, how the engine was tested, what is included, the warranty term and the freight cost to your ZIP before you pay.
Illustrative comparison of a bare used long block beside a complete used engine with intake and accessories
Left: long block (block and heads only). Right: complete engine with intake, accessories and harness. Illustrative image.

Known 6.6 Duramax wear points

  • Wikipedia notes injector problems on the LB7. GM redesigned the LLY valve covers so the injectors could be replaced without removing them, which cut labor cost. (Wikipedia: LLY)
  • Emissions hardware grows with each version: an EGR valve from the LLY, a diesel particulate filter from the LMM, and DEF (urea) injection plus the Bosch CP4 fuel pump on the LML. (Wikipedia: LLY, Wikipedia: LMM, Wikipedia: LML)

Vehicles that used the 6.6 Duramax

  • Chevrolet Silverado 2500 HD and 35002001 onward
  • GMC Sierra 2500 HD and 35002001 onward
  • Chevrolet Express2007–2010
Bars show the model years in the sourced table below. Arrow = still in production.
See the sourced table (3 rows)
VehicleModel years
Chevrolet Silverado 2500 HD and 3500Hollander lists 6.6L options for every Silverado 2500 HD year we checked, with donor trucks from 2001 to 20232001 onward
GMC Sierra 2500 HD and 3500Hollander files the 2008 and 2019 Sierra 2500 HD engines under the same numbers as the Silverado2001 onward
Chevrolet ExpressLMM van engine, a separate part number from the pickup engine2007–2010

Heavy-duty pickups are largely absent from the U.S. EPA vehicle records, so each row is backed by Wikipedia plus Hollander yard records. Wikipedia also lists the Duramax in the GMC Savana, the Chevrolet Kodiak and GMC TopKick medium-duty trucks and the 2006 Hummer H1 Alpha; no second source here covers those, so they are left off the table. Always confirm by VIN.

6.6 Duramax questions

How much does a used 6.6 Duramax engine cost?

Used-yard asking prices for a 6.6 Duramax typically ran $2,450 to $10,441 on October 22, 2026. That range runs from the lowest version's 25th percentile to the highest version's 75th percentile, across 8 versions (682 priced listings). Prices vary by version, mileage and shipping, so the supplier quotes your exact part.

Why is the LBZ Duramax so sought after?

Wikipedia credits its strength and reliability, and it came before the diesel particulate filter. GM strengthened the block, rods and pistons over the LLY.

How do I tell an LBZ from an LLY?

Check the 8th digit of the VIN: D is an LBZ. A 2 can be an LLY or an early LBZ with the LLY tune, so send the full VIN and the build date and the supplier confirms which one you have.

Will a Duramax from an Express van fit my pickup?

Not as a straight swap. Van engines carry their own part numbers and lower ratings. Ask the supplier for an engine from the same kind of vehicle as yours.

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Delivering to Texas? See Houston, Dallas, San Antonio or El Paso.

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