Fuel Filter Housing Cap Replacement for 2017-2024 GM Duramax - Durable

In this review of the iFJF fuel filter housing cap replacement, the bottom line is simple: this is a durable, precision-machined upgrade for owners of GM Duramax 6.6L L5P trucks who want a stronger alternative to the fragile factory plastic cap. The reviewer found the CNC billet 6061-T6 aluminum construction noticeably more robust during installation and routine maintenance, and the included drain plug adds useful functionality. It fits the specified GM and Cruze applications and replaces part number 134001, making it a practical swap for anyone tired of cracked or leaky OEM caps.

Key Features

• Fitment: Designed to fit GM Duramax 6.6L L5P 2017-2024 and select Cruze models, ensuring compatibility for the listed vehicles without modification.
• Material: Machined from CNC billet 6061-T6 aluminum so it resists cracking and outlasts the original plastic cap under repeated removal and installation.
• OEM Replacement: Directly replaces part number 134001 so buyers can expect the same fit and function as the factory cap but with improved durability.
• Drain Plug Included: Comes with a drain plug to make fuel draining or sampling easier during servicing, adding practical convenience.
• Precision Tested: Each cap is precision-machined and tested for fitment, reducing the chance of leaks or misalignment at installation.
• Quality Guarantee: Sold with a 100% satisfaction guarantee, providing reassurance if there is an unexpected fit or finish issue.

Who It's For

This cap is aimed at owners of Chevy Silverado and GMC Sierra 2500HD/3500HD with the Duramax 6.6L L5P engine from 2017-2024 who perform their own maintenance or want a tougher replacement part that resists damage during filter changes. It will also fit certain Cruze models listed, so DIYers of those cars looking for a robust cap can consider it.

People who should look elsewhere include those who require the original plastic appearance for resale or factory-matching aesthetics, or buyers who need an O-ring included in the package (the O-ring is not supplied). Also confirm fitment against your vehicle and part history before ordering.

Pros & Cons

Pros

• Strong CNC 6061-T6 aluminum construction reduces the chance of cracking during removal and installation.
• Direct replacement for part number 134001, simplifying upgrade decisions for compatible vehicles.
• Includes a drain plug to make servicing more convenient and cleaner.
• Precision-machined and tested for fit, backed by a satisfaction guarantee for added confidence.

Cons

• The cap does not include the O-ring, so installers may need to supply a replacement seal separately.
• Some buyers may prefer the OEM plastic look rather than a billet aluminum finish.

Specifications

Compatible Engines	GM Duramax 6.6L L5P 2017-2024; Cruze 2014-2015 2.0L; Cruze 2017-2019 1.6L
Replaces Part	134001
Material	CNC billet 6061-T6 aluminum
Included Parts	1 x fuel filter housing cap, 1 x drain plug (O-ring not included)
Fitment Type	Direct replacement, engineered to fit and function like factory housing
Finish	Billet aluminum (red in pictured version)

Our Verdict

The iFJF fuel filter housing cap is a solid upgrade for Duramax 6.6L L5P owners who want a more durable, long-lasting cap that stands up to repeated servicing. It replaces the fragile OEM plastic cap with CNC billet aluminum, includes a drain plug for convenience, and is precision-tested for fit. It represents good value for anyone who prioritizes durability, though buyers should be prepared to supply an O-ring if theirs is worn or missing.

Frequently Asked Questions

Will this cap fit my 2018 Chevy Silverado 2500HD?
Yes, it is designed to fit GM Duramax 6.6L L5P applications from 2017-2024 including Chevy Silverado 2500HD models.

Does the package include the sealing O-ring?
No, the package includes the cap and a drain plug only; the O-ring is not included and should be reused or replaced as needed.

Is the cap stronger than the factory part?
Yes, made from CNC billet 6061-T6 aluminum it is stronger and less likely to crack during installation or removal compared with the OEM plastic cap.