Fuel Filter Head Rebuild Kit, Duramax | 2001-2010

The Merchant Automotive Fuel Filter Head Rebuild Kit includes the seals needed to rebuild a leaking fuel filter head on 2001-2010 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L Duramax diesel (LB7, LLY, LBZ and LMM), and on Topkick and Kodiak medium duty trucks with the Duramax. The fuel filter head is on the passenger side of the engine on pickup trucks and on the driver side on medium duty models like the Topkick and Kodiak.

Besides holding the fuel filter, the filter head acts as the primer for the supply side of the fuel system, since an external lift pump is not standard from the factory. It also houses the fuel heater for cold weather operation.

Features

• Internal seals and U-cup seals to rebuild the filter head primer
• Viton and FKM internal seals
• Includes the bleeder screw O-ring
• Fits 2001-2010 LB7, LLY, LBZ and LMM Duramax

What's Included

• (3) Internal seals: large and medium (Viton) and small (FKM)
• (2) U-cup seals
• (1) Bleeder screw O-ring

When to Replace

Common filter head problems include visible external fuel leaks and internal leaks that you cannot see. Worn seals can cause the primer to lose the vacuum it needs to pull fuel from the tank and hold it in the lines. That lets air into the fuel system, which can cause the engine to start and then immediately stall, or not start after sitting overnight or parked on an incline.

Before You Order

• 2001-2010 only: for 2011-2016 LML trucks, see the LML Filter Head Rebuild Seal Kit.
• Need more than seals? See the Deluxe Filter Head Rebuild Kit or the Master Filter Head Kit.

Installation Tips

• Watch the step by step rebuild video below before starting. Written instructions are not included in the kit.
• Customers have reported that the factory plastic bleeder screw can break during removal. Consider replacing it with the Merchant Automotive Aluminum Fuel Filter Head Bleeder Screw.
• Make sure each seal is fully seated before reassembling the primer.

Installation Resources

• Step by step video: how to rebuild the Duramax fuel filter head

Related Parts

• Merchant Automotive Aluminum Fuel Filter Head Bleeder Screw
• ACDelco Fuel Filter, Duramax 2001-2016
• Band Style Wrench for Duramax Fuel Filter

Frequently Asked Questions

My truck won't start after sitting overnight or being parked at an uphill angle. What could that be?
Worn seals in the fuel filter head can cause these symptoms. In many cases, replacing the fuel filter head seals is an inexpensive repair that solves fuel leak and air leak symptoms.

Is the bleeder screw included?
No. The kit includes the bleeder screw O-ring. The screw itself is sold separately.

For warranty information, see our Warranty Policy.