Gates 31615D Fuel Tank Cap

Diesel Fuel Cap for Late-Model GM and Ford Applications

The Gates 31615D Diesel Only Pre-Release Fuel Cap is a green, Quick-On fuel tank cap built for specific diesel applications that require pressure-vacuum venting. It is designed for late-model and older diesel vehicles across Chevrolet, GMC, Ford, Dodge, Jeep, Toyota, Volvo, and select passenger car and truck platforms.

For buyers searching for a diesel fuel cap for a Chevrolet Express 2500, GMC Savana 3500, or Ford F-250 Super Duty, this cap provides the correct diesel-only configuration and fitment-specific design. The Gates 31615D is also cross-referenced to Gates 10819D and 34060D for the same application.

Key Features

• Brand: Gates
• Part number: 31615D
• Diesel Only Pre-Release Fuel Cap design
• Quick-On cam type for threaded filler neck applications where specified
• Pressure-vacuum venting
• Green color identification
• Non-lockable construction
• Shell diameter: 2.81 in.
• Thread diameter: 1.77 in.
• Depth: 2.14 in.

Product Details

The Gates Diesel Only Pre-Release Fuel Cap is built around the application-specific requirements listed in the fitment data, including many Chevrolet and GMC truck and van platforms plus selected Ford Super Duty, E-Series, and older light- and medium-duty vehicles. The green cap color helps identify diesel-only use, while the pressure-vacuum venting supports the fuel system configuration called for on the listed vehicles. If you need a replacement fuel tank cap for a 2006-2012 Chevrolet Express 3500, 2009-2013 GMC Savana 2500, or 1999-2005 Ford F-350 Super Duty, this part number is the direct match to verify.

Common Problems This Part Can Address

• Missing or damaged diesel fuel tank cap
• Incorrect cap type on a diesel-only filler neck
• Fuel system sealing issues caused by a worn cap
• Venting concerns on pressure-vacuum fuel tank systems
• Replacement needs for a green diesel identification cap

Installation Notes and Tips

• Verify the filler neck style and cap type before ordering, especially on threaded filler neck applications.
• Match the vehicle year, make, and model exactly to the fitment list.
• Confirm the cap is specified for diesel use only before installation.
• Check the sealing surface and filler neck condition if the original cap was loose or difficult to secure.
• Use the part number 31615D when cross-checking catalog listings or service records.

Quality Assurance

Gates is a recognized aftermarket brand with application-specific fuel system hardware. This cap is built to the listed dimensions and venting style for the confirmed vehicle applications, including Chevrolet Express, GMC Savana, and Ford Super Duty diesel models.