2021 Sierra 2500 L5P 6.6 Duramax Engine & Transmission 18k Miles

2021 GMC Sierra 2500 L5P 6.6L Duramax Engine & Transmission – 18K Miles

This 2021 GMC Sierra 2500 powertrain package features the 6.6L L5P Duramax turbo-diesel V8 paired with its compatible transmission. Designed for heavy-duty truck applications, the L5P delivers substantial torque and towing capability, making it suitable for demanding work and compatible replacement projects.

The package is listed with approximately 18,000 miles. The reported mileage and exact components should be verified before purchase, particularly when installing the powertrain in a different truck.

Compatible GMC Applications

• GMC Sierra 2500HD with matching L5P specifications
• GMC Sierra 3500HD, subject to configuration compatibility
• Compatible GMC heavy-duty truck replacement projects

Compatible Chevrolet Applications

• Chevrolet Silverado 2500HD with matching L5P specifications
• Chevrolet Silverado 3500HD, subject to configuration compatibility
• Compatible Chevrolet heavy-duty diesel truck projects

Popular Custom Applications

• GMC Sierra and Chevrolet Silverado diesel restorations
• Heavy-duty work truck replacements
• Compatible towing and hauling truck builds
• Specialized diesel performance projects
• Custom heavy-duty truck builds

Engine and Transmission Highlights

• Engine: GM 6.6L L5P Duramax turbo-diesel V8
• Model year: 2021
• Mileage: Approximately 18,000 miles, as listed
• Original application: GMC Sierra 2500HD
• Fuel type: Diesel
• Transmission: Included; exact model and configuration should be confirmed
• Ideal for: Compatible heavy-duty truck replacements and diesel projects