This is a Duramax LB7 engine for sale in fairly used condition: a complete 6.6 litre V8 turbo diesel out of a 2001 to 2004 Chevrolet Silverado or GMC Sierra HD, inspected, compression-tested and ready to ship anywhere in the world. It’s the original Duramax, with no EGR, no DPF and no DEF.
We confirm fitment from your VIN, check the oil for fuel dilution from leaking injectors, and send photos of the actual engine before you pay.
What’s Included With This Duramax LB7 Engine for Sale
- Cast iron block with crank, rods and pistons
- Both aluminium cylinder heads with valvetrain
- Injectors and fuel rails (age and condition written on your quote)
- Bosch CP3 high-pressure fuel pump
- Fixed-geometry turbocharger
- Intake, valve covers, oil pan and front cover
- Compression results, photos and a heavy-duty pallet for shipping
The Allison transmission, engine computer and harness aren’t included unless we agree it in writing. Long blocks are available on request.
Duramax LB7 Specifications
| Engine | GM 6.6L Duramax LB7 |
| Layout | 90-degree V8, turbocharged, intercooled, 4 valves per cylinder |
| Displacement | 6.6 L (402 cu in) |
| Bore x stroke | 103 mm x 99 mm |
| Compression | 17.5:1 |
| Fuel system | Bosch common rail, CP3 pump, injectors under the valve covers |
| Output | 300 hp, 520 lb-ft |
| Emissions | No EGR, no DPF, no DEF |
| VIN code | 8th digit 1 |
| Oil capacity | About 10 quarts with filter |
| Transmissions | Allison 1000 5-speed, ZF6 manual |
For the history of the engine family, see the Duramax V8 article on Wikipedia.
Vehicles This Duramax LB7 Engine for Sale Fits
- 2001 to 2004 Chevrolet Silverado 2500HD and 3500
- 2001 to 2004 GMC Sierra 2500HD and 3500
- 2003 to 2004 Chevrolet Kodiak and GMC TopKick C4500 and C5500
Partway through 2004, GM switched to the LLY, which has a 2 in the eighth VIN digit. The LLY and LB7 aren’t straight swaps, so we match the engine to your VIN. Kodiak and TopKick engines can use different brackets, pans and wiring, so send the VIN first.
Condition and Testing
Every Duramax LB7 engine for sale on this page is fairly used and tested. Before it’s listed, we:
- Run compression or leak-down on all eight cylinders
- Check the oil for fuel, coolant and metal
- Check blow-by
- Check turbo shaft play and look for oil in the intake
- Inspect for leaks at the rear main and front cover
- Turn the crank by hand to feel for binding
You get the results and photos of the exact engine with your quote.
About the LB7 Injectors
The original LB7 injectors were known to crack and leak, and GM’s old extended warranty on them is long gone. Leaking injectors can wash fuel past the rings and wear the cylinders. That’s why we check every Duramax LB7 engine for sale for fuel in the oil and test compression carefully. Replacement injectors are much better than the originals, and an engine with newer injectors is worth more. We note the injector history on the quote when we know it.
Do You Need a Replacement Engine?
A leaking injector, a fuel filter head air leak or a tired water pump is a repair. It’s time to look at a Duramax LB7 engine for sale when you have a knock, a spun bearing, a melted piston from a stuck injector, low compression from worn rings, or coolant in the oil. Rebuilding a Duramax costs a lot in machine work and parts, so a tested used engine is usually cheaper and quicker. Our replacement engine cost guide helps you compare.
Why Buy This Duramax LB7 Engine for Sale
- Tested with real numbers for every cylinder
- Fitment confirmed by VIN before you pay
- Photos of the actual engine
- Far cheaper than a remanufactured engine with new injectors
- Written warranty
- Worldwide shipping with tracking
No EGR, no DPF and no DEF means simple running costs and easy maintenance, which is why buyers in many countries still ask for a Duramax LB7 engine for sale by name.
Install Advice
- Replace the fuel filter and check the filter head for air leaks
- Flush the tank and lines if the old engine had contaminated fuel
- Clean the intercooler and pipes after any turbo or piston failure
- Refill and bleed the cooling system with the correct coolant
- Prime the oil system before first start
- Watch the oil level for the first few hundred miles
Do this and your Duramax LB7 engine for sale will give you years of work.
Who Buys This Engine
Owners keeping a clean early Silverado or Sierra on the road, farmers and contractors, hot-shot drivers, Kodiak and TopKick fleets, repair shops that need a tested engine, and exporters supplying markets where a simple diesel is worth a lot. Fleets often keep a spare Duramax LB7 engine for sale on the shelf. Ask about buying two, because shipping them together lowers the freight cost per engine.
Used vs Remanufactured
A remanufactured LB7 long block has new pistons, rings and bearings, but it’s usually sold without injectors, the CP3 pump or the turbo. Buy those new and the price climbs fast, and you still pay for all the transfer labour. A fairly used Duramax LB7 engine for sale comes as a more complete unit, has already proven itself in a truck, and costs much less overall. For most owners it’s the better value.
Towing and Fuel
The LB7 and Allison combination is a proven towing setup. Keep the radiator and intercooler clean, watch coolant temperature on long climbs, and don’t run a hot tune on old injectors. Common-rail systems hate water and dirt, so change fuel filters on time and drain the water separator, especially where fuel quality varies. Treat it that way and a Duramax LB7 engine for sale will tow like the original did when the truck was new.
Shipping Worldwide
We ship to buyers across North and South America, the Caribbean, Europe, Africa, the Middle East, Asia and Oceania. The engine is drained, sealed, bolted to a pallet and wrapped. Freight is quoted by weight and destination, and we handle export paperwork. See our shipping policy.
Payment and Ordering
We accept bank transfer only.
- Add this Duramax LB7 engine for sale to your cart, or send us your VIN.
- We confirm the fit and send photos, test results and a written quote with freight.
- You pay by bank transfer.
- We crate and ship the engine and send tracking.
Read our refund and returns policy before ordering.
More Reading
Our Duramax LB7 buyer’s guide covers specs, injectors and buying checks in detail. You may also need the Allison 1000 transmission. For later trucks see the Duramax LBZ engine. Browse all Chevy engines or the full shop.
Questions
Is this engine new?
No. It’s fairly used and tested.
Will it fit my 2005 Silverado?
No. 2004.5 to 2005 trucks used the LLY, which needs different parts and a different computer.
Is shipping included?
No. We quote freight with the engine.
How do I order?
Add this Duramax LB7 engine for sale to your cart, or send your VIN through our contact page. You can also call +1 (209) 733-0882 or WhatsApp +1 209 690 5983. We confirm the fit before you pay.
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