6.6L Duramax LB7 Fuel Filter Housing For 2001-2004 GMC Sierra Chevy Silverado

Fuel Filter Housing for Duramax LB7

This fuel filter housing for the 6.6L Duramax LB7 diesel engine secures the fuel filter and maintains clean fuel delivery for 2001–2004 GMC Sierra and Chevrolet Silverado trucks.

Overview

The fuel filter housing is the central component that locks the filter element in place and routes diesel through the system. Designed for Duramax LB7 engines, it replaces cracked, leaking, or damaged housings on 2001–2004 GMC Sierra and Chevy Silverado models. A precise fuel filter housing helps prevent air intrusion and fuel pressure loss, making it essential for reliable cold starts and steady power.

Built For Performance

• Precision-machined sealing surface for a leak-free filter connection
• Integrated primer pump port restores manual priming capability
• Corrosion-resistant aluminum construction withstands diesel fuel and road chemicals
• Direct bolt-on replacement with no drilling or modifications
• Maintains correct fuel flow to the high-pressure injection pump
• Includes water-in-fuel sensor thread for early contamination warnings

Fits These Machines

• for GMC Sierra 2500HD/3500HD 2001–2004 with 6.6L Duramax LB7
• for Chevrolet Silverado 2500HD/3500HD 2001–2004 with 6.6L Duramax LB7

On-The-Job Use

• Replacing a warped or stripped factory housing during filter changes
• Fixing fuel leaks caused by cracked aluminum near the WIF sensor port
• Restoring primer pump functionality after housing threads fail
• Replacing a heavily corroded housing on trucks used in salted-road regions
• Service work on diesel trucks with hard-start or low-power symptoms

Specs At A Glance

Good To Know

Q: Will this housing fit my 2003 Silverado 2500HD with the LB7? A: Yes, it fits all 2001–2004 Chevrolet Silverado and GMC Sierra models equipped with the 6.6L Duramax LB7 diesel engine, including HD variants.

Q: Does the housing come with the filter and primer pump? A: The housing itself is sold here; the filter, primer pump, and water-in-fuel sensor are typically reused or purchased separately, so review your setup.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.