2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Restore Your Truck’s Legendary Diesel Torque and Highway Efficiency

Are you dealing with the catastrophic aftermath of a blown head gasket, spun bearing, or seized bottom end on your 2020-2022 GMC Sierra 1500? The 3.0L LM2 Duramax inline-six is an engineering marvel, delivering incredible fuel economy and massive low-end torque. However, when a modern turbo-diesel engine suffers a major internal failure, having a mechanic tear it down and rebuild it piece by piece can take months and cost tens of thousands of dollars in specialized labor. Your truck is your livelihood, and leaving it sitting on a lift waiting for back-ordered internal parts is simply not an option. You need a fast, reliable, and cost-effective solution to get back on the road.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Step up to a fully restored drivetrain with this Complete OEM 3.0L LM2 Duramax Engine Assembly. Rigorously inspected and pulled from a 4WD vehicle with only 56,000 verified miles, this genuine GM power plant offers the absolute perfect balance of factory reliability and massive cost savings compared to buying a brand-new crate engine. Crafted to exact assembly-line specifications, this direct-replacement long block ensures you have perfect mounting alignment, seamless computer integration, and the flawless, heavy-duty towing power your premium truck was originally built to produce.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Core Features & Direct Benefits

This is where we bridge the gap between what the product is and what it does for your driving experience.

• Verified 56,000 Low-Mileage Block: Professionally salvaged and compression-tested by our auto recycling experts.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

  • Benefit: Saves you thousands of dollars over dealership prices while providing an engine with the vast majority of its operational lifespan still ahead of it.

• 100% Genuine OEM GM LM2: Built by the original manufacturer to the exact specifications of the 2020-2022 factory assembly line.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

  • Benefit: Guarantees perfect bellhousing fitment with your 10-speed automatic transmission and eliminates the frustrating wiring harness nightmares associated with aftermarket rebuilds.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

• Legendary Inline-Six Diesel Architecture: Engineered with forged steel connecting rods, a forged steel crankshaft, and hypereutectic aluminum pistons.

  • Benefit: Restores your truck’s ability to safely generate 460 lb-ft of torque for heavy trailer towing while maintaining that incredible 30 MPG highway efficiency.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

• Direct Drop-In Assembly (4WD): Configured specifically for Four-Wheel Drive layouts.

  • Benefit: Allows your mechanic to safely retain your original factory engine mounts and front differential clearance without dangerous modifications or oil pan fabrication.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Deep Dive: How to Get the Most Out of Your Replacement LM2 Engine    2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Upgrading to a healthy, verified 56K-mile engine completely transforms the reliability and resale value of your GMC Sierra 1500. However, proper preparation during the engine swap is absolutely essential for a flawless, long-lasting result.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Because the engine is already out of the truck, this is the absolute best time to perform preventative maintenance that would otherwise be incredibly difficult. We highly recommend replacing the rear main seal, the front crankshaft seal, and inspecting the turbocharger before dropping this LM2 into your engine bay. Furthermore, the LM2 utilizes a specialized oil pump drive belt located at the rear of the engine; inspecting or replacing this belt while the engine is out will save you thousands of dollars in future labor.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

Once installed, it is critical that your mechanic properly primes the engine oil system before the first start to prevent dry-start bearing damage. Always fill the crankcase with the manufacturer-specified DexosD 0W-20 synthetic diesel oil, and ensure the ECM (Engine Control Module) is properly flashed and synced to recognize the new engine sensors  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD.

Technical Specifications

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Frequently Asked Questions (FAQ)

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• Q: Does this engine assembly include the turbocharger and fuel injectors?  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

  • A: This listing is for the core engine long block (block, cylinder head, and internal rotating assembly). While some external accessories may be left attached for shipping convenience, you should plan to seamlessly transfer your existing turbocharger, high-pressure fuel pump, injectors, and alternator from your old engine onto this new block.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

• Q: Will this LM2 engine fit my 2023 GMC Sierra 1500?  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

  • A: No. For the 2023 model year, General Motors heavily updated the 3.0L Duramax and changed the engine code to LZ0. The LZ0 features different pistons, fuel injectors, and turbo architecture, and is not plug-and-play compatible with this LM2 block. This engine is strictly for 2020-2022 (and 2022 Limited) models.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

• Q: Can I use this 4WD engine in my 2-Wheel Drive (2WD) truck?  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD

  • A: The core aluminum engine block is identical. However, the oil pan and certain lower mounting brackets differ slightly to clear the front axle on a 4WD truck. If you are putting this in a 2WD truck, your mechanic will simply need to swap your original 2WD oil pan and pickup tube onto this engine before installation.  2020-2022 GMC Sierra 1500 & LTD Complete OEM 3.0L LM2 Duramax Engine Assembly 4WD