Used 6.6L Duramax Engine for Silverado & Sierra HD
VIN-verified before purchase · Tested before shipping · Up to 1-year warranty · Free shipping in the lower 48
A used 6.6L Duramax from OG Auto Parts & Supply typically costs $6,100 to $8,800 delivered, with free shipping across the lower 48 and up to a 1-year warranty. The exact price depends on the engine code (LBZ, LMM or LML), mileage and your VIN. Call (949) 996-7252 for a price in about 5 minutes.
Get your 6.6L Duramax price
Free quote · No payment now · Usually within 5 minutes, 7 days a week
6.6L Duramax specs and fitment
| Item | Detail | Source |
|---|---|---|
| Engine | GM Duramax 6.6L turbo-diesel V8 | NHTSA vPIC VIN decode |
| Displacement | 6.6 liters | NHTSA vPIC VIN decode |
| Layout | V8, turbocharged | NHTSA vPIC VIN decode (2011 Silverado HD) |
| Fuel | Diesel | NHTSA vPIC VIN decode |
| Engine codes we quote | LBZ, LMM, LML | OG quote data |
| VIN 8th digit | "8" = LML (checked 2011 and 2016 Silverado HD) | NHTSA vPIC VIN decode |
| Most requested fitment | 2006–2016 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD | OG quote data |
We confirm fitment against your VIN before you pay.
What sets the price
- Mileage and model year: lower-mileage and newer engines cost more.
- Long block or complete: what is included changes the price; we spell it out in your quote.
- Shipping: free across the lower 48 states (freight is included in the price).
- Warranty: up to 1 year, depending on the unit.
Typical delivered price: $6,100 – $8,800. Free shipping, up to 1-year warranty. Exact price by VIN. Ranges are based on typical US used-engine prices checked in November 2026.
Before you buy a used 6.6L Duramax
- Know your engine code: LBZ, LMM and LML are different engines. We read the 8th digit of your VIN to confirm which one you have.
- Match the emissions equipment to your model year so the truck stays legal and runs right.
- Tell us whether you need a long block or a complete engine; we confirm exactly what is included before you pay.
- Most of these trucks use the Allison 1000 automatic. Used transmissions.
How it works
- Send your VIN or year and model (form, call or text).
- We confirm the right engine for your truck and send one all-in price, usually within 5 minutes.
- You pay, and the engine ships free to your home or shop with tracking. It is tested and inspected before it ships.
Questions about the 6.6L Duramax
How much does a used 6.6 Duramax cost?
Typical delivered price is $6,100 to $8,800, including free shipping across the lower 48 and up to a 1-year warranty. Your exact price depends on the engine code, mileage and your VIN.
How do I know if I have an LBZ, LMM or LML?
The 8th digit of your VIN identifies the engine. For example, "8" is the LML on 2011 and 2016 Silverado HD trucks (NHTSA vPIC). Send us your VIN and we confirm it before you pay.
Is the engine tested?
Yes. Every engine is tested and inspected before it ships, and it comes with up to a 1-year warranty.
How fast do I get a price?
Usually within 5 minutes, 7 days a week. Call or text (949) 996-7252 or use the quote form on this page.
Related engines
- Used 6.7L Cummins engine
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- All used engines
- Used transmissions
- Contact OG Auto Parts
OG Auto Parts & Supply sells used engines and transmissions across the United States. Call or text (949) 996-7252. Free shipping in the lower 48, up to a 1-year warranty, and every unit is tested and inspected before shipping.