01-04 GM Duramax 6.6L LB7 Long Block
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This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.
Regular price
$13,632.37
I acknowledge a $3,480 Core Charge will be added to my order. Core Refunds are issued after the eligible core is returned and approved. This $3,480.00 fee will be added to your cart.
Heavy Item
This item ships by freight. Shipping isn't calculated at checkout — we'll contact you with a freight quote after your order is placed.
Verified Fitment & Application Support
This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.
Got Questions? Feel free to email us or call us at (503) 235-1947
Compliance & Restrictions
California Proposition 65 (Prop 65)
WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
CARB / California Emissions Compliance
This item may be restricted in California and other regions with emissions regulations. If applicable, it is intended for
competition/off-road use only unless otherwise stated. It is the customer’s responsibility to confirm local compliance before purchase.
Orders shipping to restricted areas may be canceled.
The 01-04 GM Duramax 6.6L LB7 Long Block (DFC660104LB7LB) is a remanufactured long block built to replace the tired diesel in your GM 6.6L Duramax LB7.
Fits: 2001-2004 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD 6.6L Duramax LB7
- Remanufactured to factory spec on Rottler machining equipment for tighter-than-OEM tolerances
- $2,900 core charge includes the $500 crate charge — return the crate with your core for full credit
- EDM oil pump shaft with hardened dowel to guard against slipping and oil pressure loss
- Block bored for the next oversize piston — no sleeves used
- All-new pistons, rings, bearings, gaskets, seals, valves, springs and cast guides
- Assembled with name-brand components to tolerances tighter than the OEM specification, on application-specific tooling
Perfect for work trucks, fleet service and daily drivers needing a dependable factory-spec replacement.
Shipping Height: 33.0
Shipping Length: 44.0
Shipping Width: 36.0