2001-2004.5 GM/CHEVROLET 6.6L DURAMAX LB7 TURBO OIL DRAIN RETURN LINE
Replace your worn or leaking turbo oil return line with this high-quality aftermarket unit designed specifically for the 2001–2004.5 GM/Chevrolet 6.6L Duramax LB7 engine. The turbocharger's oil drain line is responsible for channeling oil back from the turbo into the engine's crankcase—essential to maintaining proper lubrication and turbo longevity.
A damaged or clogged return line can lead to oil leaks, turbo seal failure, or even turbo damage. This direct-fit replacement restores proper drainage and ensures smooth turbo operation.
What’s Included in the Kit:
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1x Turbo Oil Drain Return Line
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2x Gaskets or Seals
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1x Mounting Flange
Features & Benefits:
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Direct replacement for the factory LB7 turbo oil return line
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Maintains proper oil flow back to engine crankcase
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Precision-bent tubing with correct routing for easy installation
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Durable heat-resistant construction
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Prevents oil leaks from turbo drain area
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Ideal for use with stock or replacement turbos
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Helps prevent turbo seal failure caused by pressure buildup
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Includes mounting hardware or seals (if applicable)
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Designed for long-lasting performance under diesel conditions
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Compatible with factory and most aftermarket LB7 turbos
Truck Compatibility / Applications:
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2001–2004 Chevrolet Silverado 2500HD / 3500 6.6L Duramax LB7
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2001–2004 GMC Sierra 2500HD / 3500 6.6L Duramax LB7
Designed for OEM-style turbochargers on the LB7 platform. Not intended for LLY, LBZ, or newer Duramax engines.
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✔️ Orders are processed within 1 business day (Monday–Friday).
✔️ Orders placed on weekends or holidays will be processed on the next business day.
✔️ Tracking information will be provided once the item ships.
✔️ Shipping to PO Boxes, APO/FPO may be limited based on carrier restrictions.
California Proposition 65 Warning:
This product may expose you to chemicals including lead, chromium, or other materials, which are known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit: www.P65Warnings.ca.gov
Interchange Part #:
- Dorman 904-117
- GM 97239132
